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dd2155a4 DM |
1 | /* pad.c |
2 | * | |
1129b882 NC |
3 | * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
4 | * by Larry Wall and others | |
dd2155a4 DM |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
4ac71550 TC |
8 | */ |
9 | ||
10 | /* | |
11 | * 'Anyway: there was this Mr. Frodo left an orphan and stranded, as you | |
12 | * might say, among those queer Bucklanders, being brought up anyhow in | |
13 | * Brandy Hall. A regular warren, by all accounts. Old Master Gorbadoc | |
14 | * never had fewer than a couple of hundred relations in the place. | |
15 | * Mr. Bilbo never did a kinder deed than when he brought the lad back | |
16 | * to live among decent folk.' --the Gaffer | |
dd2155a4 | 17 | * |
4ac71550 | 18 | * [p.23 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] |
dd2155a4 DM |
19 | */ |
20 | ||
21 | /* XXX DAPM | |
22 | * As of Sept 2002, this file is new and may be in a state of flux for | |
23 | * a while. I've marked things I intent to come back and look at further | |
24 | * with an 'XXX DAPM' comment. | |
25 | */ | |
26 | ||
27 | /* | |
28 | =head1 Pad Data Structures | |
29 | ||
cc76b5cc | 30 | =for apidoc Amx|PADLIST *|CvPADLIST|CV *cv |
166f8a29 | 31 | |
58a9b2fe | 32 | CV's can have CvPADLIST(cv) set to point to a PADLIST. This is the CV's |
cc76b5cc Z |
33 | scratchpad, which stores lexical variables and opcode temporary and |
34 | per-thread values. | |
dd2155a4 | 35 | |
58a9b2fe | 36 | For these purposes "formats" are a kind-of CV; eval""s are too (except they're |
dd2155a4 | 37 | not callable at will and are always thrown away after the eval"" is done |
58a9b2fe | 38 | executing). Require'd files are simply evals without any outer lexical |
b5c19bd7 | 39 | scope. |
dd2155a4 DM |
40 | |
41 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, | |
42 | but that is really the callers pad (a slot of which is allocated by | |
43 | every entersub). | |
44 | ||
58a9b2fe | 45 | The PADLIST has a C array where pads are stored. |
dd2155a4 | 46 | |
58a9b2fe FC |
47 | The 0th entry of the PADLIST is a PADNAMELIST (which is actually just an |
48 | AV, but that may change) which represents the "names" or rather | |
49 | the "static type information" for lexicals. The individual elements of a | |
7a5eb04d FC |
50 | PADNAMELIST are PADNAMEs (just SVs; but, again, that may change). Future |
51 | refactorings might stop the PADNAMELIST from being stored in the PADLIST's | |
86d2498c | 52 | array, so don't rely on it. See L</PadlistNAMES>. |
dd2155a4 | 53 | |
58a9b2fe FC |
54 | The CvDEPTH'th entry of a PADLIST is a PAD (an AV) which is the stack frame |
55 | at that depth of recursion into the CV. The 0th slot of a frame AV is an | |
56 | AV which is @_. Other entries are storage for variables and op targets. | |
dd2155a4 | 57 | |
58a9b2fe FC |
58 | Iterating over the PADNAMELIST iterates over all possible pad |
59 | items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having | |
dd2155a4 DM |
60 | &PL_sv_undef "names" (see pad_alloc()). |
61 | ||
58a9b2fe | 62 | Only my/our variable (SvPADMY/PADNAME_isOUR) slots get valid names. |
dd2155a4 DM |
63 | The rest are op targets/GVs/constants which are statically allocated |
64 | or resolved at compile time. These don't have names by which they | |
58a9b2fe | 65 | can be looked up from Perl code at run time through eval"" the way |
dd2155a4 DM |
66 | my/our variables can be. Since they can't be looked up by "name" |
67 | but only by their index allocated at compile time (which is usually | |
68 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
69 | ||
70 | The SVs in the names AV have their PV being the name of the variable. | |
3441fb63 | 71 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
61f4bfbf DM |
72 | which the name is valid (accessed through the macros COP_SEQ_RANGE_LOW and |
73 | _HIGH). During compilation, these fields may hold the special value | |
74 | PERL_PADSEQ_INTRO to indicate various stages: | |
0d311cdb DM |
75 | |
76 | COP_SEQ_RANGE_LOW _HIGH | |
77 | ----------------- ----- | |
78 | PERL_PADSEQ_INTRO 0 variable not yet introduced: { my ($x | |
79 | valid-seq# PERL_PADSEQ_INTRO variable in scope: { my ($x) | |
80 | valid-seq# valid-seq# compilation of scope complete: { my ($x) } | |
81 | ||
82 | For typed lexicals name SV is SVt_PVMG and SvSTASH | |
3441fb63 | 83 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the |
73d95100 | 84 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb | 85 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 | 86 | sometimes hijacked to store the generation number during compilation. |
dd2155a4 | 87 | |
c44737a2 FC |
88 | If PADNAME_OUTER (SvFAKE) is set on the |
89 | name SV, then that slot in the frame AV is | |
b5c19bd7 | 90 | a REFCNT'ed reference to a lexical from "outside". In this case, |
3441fb63 NC |
91 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
92 | in scope throughout. Instead xhigh stores some flags containing info about | |
b5c19bd7 | 93 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 | 94 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 DM |
95 | within the parent's pad where the lexical's value is stored, to make |
96 | cloning quicker. | |
dd2155a4 | 97 | |
58a9b2fe | 98 | If the 'name' is '&' the corresponding entry in the PAD |
dd2155a4 | 99 | is a CV representing a possible closure. |
c44737a2 FC |
100 | (PADNAME_OUTER and name of '&' is not a |
101 | meaningful combination currently but could | |
dd2155a4 DM |
102 | become so if C<my sub foo {}> is implemented.) |
103 | ||
71f882da DM |
104 | Note that formats are treated as anon subs, and are cloned each time |
105 | write is called (if necessary). | |
106 | ||
ab8e66c1 | 107 | The flag SVs_PADSTALE is cleared on lexicals each time the my() is executed, |
58a9b2fe FC |
108 | and set on scope exit. This allows the |
109 | 'Variable $x is not available' warning | |
e6e7068b DM |
110 | to be generated in evals, such as |
111 | ||
112 | { my $x = 1; sub f { eval '$x'} } f(); | |
113 | ||
58a9b2fe | 114 | For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised'. |
d1186544 | 115 | |
36c300bb | 116 | =for apidoc AmxU|PADNAMELIST *|PL_comppad_name |
cc76b5cc Z |
117 | |
118 | During compilation, this points to the array containing the names part | |
119 | of the pad for the currently-compiling code. | |
120 | ||
36c300bb | 121 | =for apidoc AmxU|PAD *|PL_comppad |
cc76b5cc Z |
122 | |
123 | During compilation, this points to the array containing the values | |
124 | part of the pad for the currently-compiling code. (At runtime a CV may | |
125 | have many such value arrays; at compile time just one is constructed.) | |
126 | At runtime, this points to the array containing the currently-relevant | |
127 | values for the pad for the currently-executing code. | |
128 | ||
129 | =for apidoc AmxU|SV **|PL_curpad | |
130 | ||
131 | Points directly to the body of the L</PL_comppad> array. | |
c14a2249 | 132 | (I.e., this is C<PAD_ARRAY(PL_comppad)>.) |
cc76b5cc | 133 | |
dd2155a4 DM |
134 | =cut |
135 | */ | |
136 | ||
137 | ||
138 | #include "EXTERN.h" | |
139 | #define PERL_IN_PAD_C | |
140 | #include "perl.h" | |
952306ac | 141 | #include "keywords.h" |
dd2155a4 | 142 | |
3441fb63 NC |
143 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
144 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
145 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ | |
146 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
809abb02 | 147 | |
3441fb63 NC |
148 | #define PARENT_PAD_INDEX_set(sv,val) \ |
149 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
150 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ | |
151 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
dd2155a4 | 152 | |
cc76b5cc Z |
153 | /* |
154 | =for apidoc mx|void|pad_peg|const char *s | |
155 | ||
156 | When PERL_MAD is enabled, this is a small no-op function that gets called | |
157 | at the start of each pad-related function. It can be breakpointed to | |
158 | track all pad operations. The parameter is a string indicating the type | |
159 | of pad operation being performed. | |
160 | ||
161 | =cut | |
162 | */ | |
163 | ||
1dba731d NC |
164 | #ifdef PERL_MAD |
165 | void pad_peg(const char* s) { | |
790427a5 DM |
166 | static int pegcnt; /* XXX not threadsafe */ |
167 | PERL_UNUSED_ARG(s); | |
7918f24d NC |
168 | |
169 | PERL_ARGS_ASSERT_PAD_PEG; | |
170 | ||
1dba731d NC |
171 | pegcnt++; |
172 | } | |
173 | #endif | |
dd2155a4 DM |
174 | |
175 | /* | |
5b16296c BF |
176 | This is basically sv_eq_flags() in sv.c, but we avoid the magic |
177 | and bytes checking. | |
178 | */ | |
179 | ||
76d60a53 NC |
180 | static bool |
181 | sv_eq_pvn_flags(pTHX_ const SV *sv, const char* pv, const STRLEN pvlen, const U32 flags) { | |
5b16296c BF |
182 | if ( (SvUTF8(sv) & SVf_UTF8 ) != (flags & SVf_UTF8) ) { |
183 | const char *pv1 = SvPVX_const(sv); | |
184 | STRLEN cur1 = SvCUR(sv); | |
185 | const char *pv2 = pv; | |
186 | STRLEN cur2 = pvlen; | |
187 | if (PL_encoding) { | |
188 | SV* svrecode = NULL; | |
189 | if (SvUTF8(sv)) { | |
190 | svrecode = newSVpvn(pv2, cur2); | |
191 | sv_recode_to_utf8(svrecode, PL_encoding); | |
192 | pv2 = SvPV_const(svrecode, cur2); | |
193 | } | |
194 | else { | |
195 | svrecode = newSVpvn(pv1, cur1); | |
196 | sv_recode_to_utf8(svrecode, PL_encoding); | |
197 | pv1 = SvPV_const(svrecode, cur1); | |
198 | } | |
199 | SvREFCNT_dec(svrecode); | |
200 | } | |
201 | if (flags & SVf_UTF8) | |
202 | return (bytes_cmp_utf8( | |
203 | (const U8*)pv1, cur1, | |
204 | (const U8*)pv2, cur2) == 0); | |
205 | else | |
206 | return (bytes_cmp_utf8( | |
207 | (const U8*)pv2, cur2, | |
208 | (const U8*)pv1, cur1) == 0); | |
209 | } | |
210 | else | |
211 | return ((SvPVX_const(sv) == pv) | |
212 | || memEQ(SvPVX_const(sv), pv, pvlen)); | |
213 | } | |
214 | ||
215 | ||
216 | /* | |
cc76b5cc | 217 | =for apidoc Am|PADLIST *|pad_new|int flags |
dd2155a4 | 218 | |
cc76b5cc Z |
219 | Create a new padlist, updating the global variables for the |
220 | currently-compiling padlist to point to the new padlist. The following | |
221 | flags can be OR'ed together: | |
dd2155a4 DM |
222 | |
223 | padnew_CLONE this pad is for a cloned CV | |
cc76b5cc | 224 | padnew_SAVE save old globals on the save stack |
dd2155a4 DM |
225 | padnew_SAVESUB also save extra stuff for start of sub |
226 | ||
227 | =cut | |
228 | */ | |
229 | ||
230 | PADLIST * | |
c7c737cb | 231 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 232 | { |
97aff369 | 233 | dVAR; |
7261499d FC |
234 | PADLIST *padlist; |
235 | PAD *padname, *pad; | |
236 | PAD **ary; | |
dd2155a4 | 237 | |
f3548bdc DM |
238 | ASSERT_CURPAD_LEGAL("pad_new"); |
239 | ||
dd2155a4 DM |
240 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
241 | * vars (based on flags) rather than storing vals + addresses for | |
242 | * each individually. Also see pad_block_start. | |
243 | * XXX DAPM Try to see whether all these conditionals are required | |
244 | */ | |
245 | ||
246 | /* save existing state, ... */ | |
247 | ||
248 | if (flags & padnew_SAVE) { | |
3979c56f | 249 | SAVECOMPPAD(); |
dd2155a4 | 250 | if (! (flags & padnew_CLONE)) { |
cbacc9aa | 251 | SAVESPTR(PL_comppad_name); |
dd2155a4 DM |
252 | SAVEI32(PL_padix); |
253 | SAVEI32(PL_comppad_name_fill); | |
254 | SAVEI32(PL_min_intro_pending); | |
255 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 256 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 257 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 258 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
259 | } |
260 | } | |
261 | } | |
262 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
263 | * saved - check at some pt that this is okay */ | |
264 | ||
265 | /* ... create new pad ... */ | |
266 | ||
7261499d | 267 | Newxz(padlist, 1, PADLIST); |
dd2155a4 DM |
268 | pad = newAV(); |
269 | ||
270 | if (flags & padnew_CLONE) { | |
271 | /* XXX DAPM I dont know why cv_clone needs it | |
272 | * doing differently yet - perhaps this separate branch can be | |
273 | * dispensed with eventually ??? | |
274 | */ | |
275 | ||
e1ec3a88 | 276 | AV * const a0 = newAV(); /* will be @_ */ |
ad64d0ec | 277 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 278 | AvREIFY_only(a0); |
9ef8d569 FC |
279 | |
280 | padname = (PAD *)SvREFCNT_inc_simple_NN(PL_comppad_name); | |
dd2155a4 DM |
281 | } |
282 | else { | |
a0714e2c | 283 | av_store(pad, 0, NULL); |
9ef8d569 | 284 | padname = newAV(); |
dd2155a4 DM |
285 | } |
286 | ||
7a6072a8 NC |
287 | /* Most subroutines never recurse, hence only need 2 entries in the padlist |
288 | array - names, and depth=1. The default for av_store() is to allocate | |
289 | 0..3, and even an explicit call to av_extend() with <3 will be rounded | |
290 | up, so we inline the allocation of the array here. */ | |
7261499d | 291 | Newx(ary, 2, PAD *); |
86d2498c FC |
292 | PadlistMAX(padlist) = 1; |
293 | PadlistARRAY(padlist) = ary; | |
7261499d FC |
294 | ary[0] = padname; |
295 | ary[1] = pad; | |
dd2155a4 DM |
296 | |
297 | /* ... then update state variables */ | |
298 | ||
403799bf NC |
299 | PL_comppad = pad; |
300 | PL_curpad = AvARRAY(pad); | |
dd2155a4 DM |
301 | |
302 | if (! (flags & padnew_CLONE)) { | |
9ef8d569 | 303 | PL_comppad_name = padname; |
dd2155a4 DM |
304 | PL_comppad_name_fill = 0; |
305 | PL_min_intro_pending = 0; | |
306 | PL_padix = 0; | |
b5c19bd7 | 307 | PL_cv_has_eval = 0; |
dd2155a4 DM |
308 | } |
309 | ||
310 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 311 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 312 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 313 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
314 | PTR2UV(padname), (UV)flags |
315 | ) | |
316 | ); | |
317 | ||
318 | return (PADLIST*)padlist; | |
319 | } | |
320 | ||
dd2155a4 | 321 | |
c4528262 NC |
322 | /* |
323 | =head1 Embedding Functions | |
324 | ||
325 | =for apidoc cv_undef | |
326 | ||
327 | Clear out all the active components of a CV. This can happen either | |
328 | by an explicit C<undef &foo>, or by the reference count going to zero. | |
329 | In the former case, we keep the CvOUTSIDE pointer, so that any anonymous | |
330 | children can still follow the full lexical scope chain. | |
331 | ||
332 | =cut | |
333 | */ | |
334 | ||
335 | void | |
336 | Perl_cv_undef(pTHX_ CV *cv) | |
337 | { | |
338 | dVAR; | |
c2736fce | 339 | const PADLIST *padlist = CvPADLIST(cv); |
8be227ab | 340 | bool const slabbed = !!CvSLABBED(cv); |
c4528262 NC |
341 | |
342 | PERL_ARGS_ASSERT_CV_UNDEF; | |
343 | ||
344 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
345 | "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n", | |
346 | PTR2UV(cv), PTR2UV(PL_comppad)) | |
347 | ); | |
348 | ||
bad4ae38 | 349 | if (CvFILE(cv) && CvDYNFILE(cv)) { |
c4528262 NC |
350 | Safefree(CvFILE(cv)); |
351 | } | |
352 | CvFILE(cv) = NULL; | |
dd2155a4 | 353 | |
8be227ab | 354 | CvSLABBED_off(cv); |
c4528262 NC |
355 | if (!CvISXSUB(cv) && CvROOT(cv)) { |
356 | if (SvTYPE(cv) == SVt_PVCV && CvDEPTH(cv)) | |
357 | Perl_croak(aTHX_ "Can't undef active subroutine"); | |
358 | ENTER; | |
359 | ||
360 | PAD_SAVE_SETNULLPAD(); | |
361 | ||
8be227ab | 362 | if (slabbed) OpslabREFCNT_dec_padok(OpSLAB(CvROOT(cv))); |
c4528262 NC |
363 | op_free(CvROOT(cv)); |
364 | CvROOT(cv) = NULL; | |
365 | CvSTART(cv) = NULL; | |
366 | LEAVE; | |
367 | } | |
8be227ab FC |
368 | else if (slabbed && CvSTART(cv)) { |
369 | ENTER; | |
370 | PAD_SAVE_SETNULLPAD(); | |
371 | ||
372 | /* discard any leaked ops */ | |
373 | opslab_force_free((OPSLAB *)CvSTART(cv)); | |
374 | CvSTART(cv) = NULL; | |
375 | ||
376 | LEAVE; | |
377 | } | |
7aef8e5b | 378 | #ifdef DEBUGGING |
8be227ab | 379 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", cv); |
8be227ab | 380 | #endif |
c4528262 | 381 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ |
2f14e398 | 382 | sv_unmagic((SV *)cv, PERL_MAGIC_checkcall); |
2e800d79 | 383 | if (CvNAMED(cv)) CvNAME_HEK_set(cv, NULL); |
b290562e | 384 | else CvGV_set(cv, NULL); |
c4528262 | 385 | |
c2736fce NC |
386 | /* This statement and the subsequence if block was pad_undef(). */ |
387 | pad_peg("pad_undef"); | |
388 | ||
7261499d | 389 | if (padlist) { |
c2736fce NC |
390 | I32 ix; |
391 | ||
392 | /* Free the padlist associated with a CV. | |
393 | If parts of it happen to be current, we null the relevant PL_*pad* | |
394 | global vars so that we don't have any dangling references left. | |
395 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
396 | subs to the outer of this cv. */ | |
397 | ||
398 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
399 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", | |
400 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
401 | ); | |
402 | ||
403 | /* detach any '&' anon children in the pad; if afterwards they | |
404 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
405 | * bypassing us. */ | |
406 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
407 | * children, or integrate this loop with general cleanup */ | |
408 | ||
409 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
410 | CV * const outercv = CvOUTSIDE(cv); | |
411 | const U32 seq = CvOUTSIDE_SEQ(cv); | |
86d2498c | 412 | PAD * const comppad_name = PadlistARRAY(padlist)[0]; |
c2736fce | 413 | SV ** const namepad = AvARRAY(comppad_name); |
86d2498c | 414 | PAD * const comppad = PadlistARRAY(padlist)[1]; |
c2736fce NC |
415 | SV ** const curpad = AvARRAY(comppad); |
416 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
417 | SV * const namesv = namepad[ix]; | |
418 | if (namesv && namesv != &PL_sv_undef | |
419 | && *SvPVX_const(namesv) == '&') | |
420 | { | |
421 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
422 | U32 inner_rc = SvREFCNT(innercv); | |
423 | assert(inner_rc); | |
e09ac076 | 424 | assert(SvTYPE(innercv) != SVt_PVFM); |
c2736fce NC |
425 | |
426 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
427 | curpad[ix] = NULL; | |
428 | SvREFCNT_dec(innercv); | |
429 | inner_rc--; | |
430 | } | |
431 | ||
432 | /* in use, not just a prototype */ | |
433 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
434 | assert(CvWEAKOUTSIDE(innercv)); | |
435 | /* don't relink to grandfather if he's being freed */ | |
436 | if (outercv && SvREFCNT(outercv)) { | |
437 | CvWEAKOUTSIDE_off(innercv); | |
438 | CvOUTSIDE(innercv) = outercv; | |
439 | CvOUTSIDE_SEQ(innercv) = seq; | |
440 | SvREFCNT_inc_simple_void_NN(outercv); | |
441 | } | |
442 | else { | |
443 | CvOUTSIDE(innercv) = NULL; | |
444 | } | |
445 | } | |
446 | } | |
447 | } | |
448 | } | |
449 | ||
86d2498c | 450 | ix = PadlistMAX(padlist); |
aa2f79cf | 451 | while (ix > 0) { |
86d2498c | 452 | PAD * const sv = PadlistARRAY(padlist)[ix--]; |
c2736fce | 453 | if (sv) { |
7261499d | 454 | if (sv == PL_comppad) { |
c2736fce NC |
455 | PL_comppad = NULL; |
456 | PL_curpad = NULL; | |
457 | } | |
aa2f79cf | 458 | SvREFCNT_dec(sv); |
c2736fce | 459 | } |
aa2f79cf NC |
460 | } |
461 | { | |
86d2498c | 462 | PAD * const sv = PadlistARRAY(padlist)[0]; |
9ef8d569 | 463 | if (sv == PL_comppad_name && SvREFCNT(sv) == 1) |
aa2f79cf | 464 | PL_comppad_name = NULL; |
c2736fce NC |
465 | SvREFCNT_dec(sv); |
466 | } | |
86d2498c | 467 | if (PadlistARRAY(padlist)) Safefree(PadlistARRAY(padlist)); |
7261499d | 468 | Safefree(padlist); |
c2736fce NC |
469 | CvPADLIST(cv) = NULL; |
470 | } | |
471 | ||
c4528262 NC |
472 | |
473 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
474 | if (!SvREFCNT(cv) && CvOUTSIDE(cv)) { | |
475 | if (!CvWEAKOUTSIDE(cv)) | |
476 | SvREFCNT_dec(CvOUTSIDE(cv)); | |
477 | CvOUTSIDE(cv) = NULL; | |
478 | } | |
479 | if (CvCONST(cv)) { | |
480 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(cv).any_ptr)); | |
481 | CvCONST_off(cv); | |
482 | } | |
483 | if (CvISXSUB(cv) && CvXSUB(cv)) { | |
484 | CvXSUB(cv) = NULL; | |
485 | } | |
486 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
2c374370 FC |
487 | * ref status of CvOUTSIDE and CvGV, and ANON, which pp_entersub uses |
488 | * to choose an error message */ | |
489 | CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON); | |
c4528262 | 490 | } |
dd2155a4 | 491 | |
50dc2bd3 FC |
492 | /* |
493 | =for apidoc cv_forget_slab | |
494 | ||
495 | When a CV has a reference count on its slab (CvSLABBED), it is responsible | |
496 | for making sure it is freed. (Hence, no two CVs should ever have a | |
497 | reference count on the same slab.) The CV only needs to reference the slab | |
498 | during compilation. Once it is compiled and CvROOT attached, it has | |
499 | finished its job, so it can forget the slab. | |
500 | ||
501 | =cut | |
502 | */ | |
503 | ||
8be227ab FC |
504 | void |
505 | Perl_cv_forget_slab(pTHX_ CV *cv) | |
506 | { | |
507 | const bool slabbed = !!CvSLABBED(cv); | |
3107b51f | 508 | OPSLAB *slab = NULL; |
8be227ab FC |
509 | |
510 | PERL_ARGS_ASSERT_CV_FORGET_SLAB; | |
511 | ||
512 | if (!slabbed) return; | |
513 | ||
514 | CvSLABBED_off(cv); | |
515 | ||
3107b51f FC |
516 | if (CvROOT(cv)) slab = OpSLAB(CvROOT(cv)); |
517 | else if (CvSTART(cv)) slab = (OPSLAB *)CvSTART(cv); | |
7aef8e5b | 518 | #ifdef DEBUGGING |
8be227ab | 519 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", cv); |
7aef8e5b | 520 | #endif |
3107b51f | 521 | |
3107b51f | 522 | if (slab) { |
f3e29105 NC |
523 | #ifdef PERL_DEBUG_READONLY_OPS |
524 | const size_t refcnt = slab->opslab_refcnt; | |
525 | #endif | |
3107b51f | 526 | OpslabREFCNT_dec(slab); |
f3e29105 | 527 | #ifdef PERL_DEBUG_READONLY_OPS |
3107b51f | 528 | if (refcnt > 1) Slab_to_ro(slab); |
8be227ab | 529 | #endif |
f3e29105 | 530 | } |
7aef8e5b | 531 | } |
8be227ab | 532 | |
cc76b5cc Z |
533 | /* |
534 | =for apidoc m|PADOFFSET|pad_alloc_name|SV *namesv|U32 flags|HV *typestash|HV *ourstash | |
535 | ||
1a115e49 FC |
536 | Allocates a place in the currently-compiling |
537 | pad (via L<perlapi/pad_alloc>) and | |
cc76b5cc Z |
538 | then stores a name for that entry. I<namesv> is adopted and becomes the |
539 | name entry; it must already contain the name string and be sufficiently | |
540 | upgraded. I<typestash> and I<ourstash> and the C<padadd_STATE> flag get | |
1a115e49 FC |
541 | added to I<namesv>. None of the other |
542 | processing of L<perlapi/pad_add_name_pvn> | |
cc76b5cc Z |
543 | is done. Returns the offset of the allocated pad slot. |
544 | ||
545 | =cut | |
546 | */ | |
547 | ||
3291825f | 548 | static PADOFFSET |
cc76b5cc | 549 | S_pad_alloc_name(pTHX_ SV *namesv, U32 flags, HV *typestash, HV *ourstash) |
3291825f NC |
550 | { |
551 | dVAR; | |
552 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); | |
553 | ||
cc76b5cc | 554 | PERL_ARGS_ASSERT_PAD_ALLOC_NAME; |
3291825f | 555 | |
cc76b5cc | 556 | ASSERT_CURPAD_ACTIVE("pad_alloc_name"); |
3291825f NC |
557 | |
558 | if (typestash) { | |
559 | assert(SvTYPE(namesv) == SVt_PVMG); | |
560 | SvPAD_TYPED_on(namesv); | |
561 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); | |
562 | } | |
563 | if (ourstash) { | |
564 | SvPAD_OUR_on(namesv); | |
565 | SvOURSTASH_set(namesv, ourstash); | |
566 | SvREFCNT_inc_simple_void_NN(ourstash); | |
567 | } | |
59cfed7d | 568 | else if (flags & padadd_STATE) { |
3291825f NC |
569 | SvPAD_STATE_on(namesv); |
570 | } | |
571 | ||
572 | av_store(PL_comppad_name, offset, namesv); | |
573 | return offset; | |
574 | } | |
575 | ||
dd2155a4 | 576 | /* |
cc76b5cc | 577 | =for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 578 | |
cc76b5cc Z |
579 | Allocates a place in the currently-compiling pad for a named lexical |
580 | variable. Stores the name and other metadata in the name part of the | |
581 | pad, and makes preparations to manage the variable's lexical scoping. | |
582 | Returns the offset of the allocated pad slot. | |
dd2155a4 | 583 | |
cc76b5cc Z |
584 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. |
585 | If I<typestash> is non-null, the name is for a typed lexical, and this | |
586 | identifies the type. If I<ourstash> is non-null, it's a lexical reference | |
587 | to a package variable, and this identifies the package. The following | |
588 | flags can be OR'ed together: | |
589 | ||
590 | padadd_OUR redundantly specifies if it's a package var | |
591 | padadd_STATE variable will retain value persistently | |
592 | padadd_NO_DUP_CHECK skip check for lexical shadowing | |
dd2155a4 DM |
593 | |
594 | =cut | |
595 | */ | |
596 | ||
dd2155a4 | 597 | PADOFFSET |
cc76b5cc Z |
598 | Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen, |
599 | U32 flags, HV *typestash, HV *ourstash) | |
dd2155a4 | 600 | { |
97aff369 | 601 | dVAR; |
3291825f | 602 | PADOFFSET offset; |
cca43f78 | 603 | SV *namesv; |
e8b34487 | 604 | bool is_utf8; |
dd2155a4 | 605 | |
cc76b5cc | 606 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN; |
7918f24d | 607 | |
2435e5d3 | 608 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK|padadd_UTF8_NAME)) |
cc76b5cc | 609 | Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf, |
cca43f78 NC |
610 | (UV)flags); |
611 | ||
612 | namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
e8b34487 BF |
613 | |
614 | if ((is_utf8 = ((flags & padadd_UTF8_NAME) != 0))) { | |
615 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
616 | } | |
617 | ||
0727928e BF |
618 | sv_setpvn(namesv, namepv, namelen); |
619 | ||
e8b34487 BF |
620 | if (is_utf8) { |
621 | flags |= padadd_UTF8_NAME; | |
622 | SvUTF8_on(namesv); | |
623 | } | |
624 | else | |
625 | flags &= ~padadd_UTF8_NAME; | |
dd2155a4 | 626 | |
59cfed7d | 627 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
2d12d04f | 628 | /* check for duplicate declaration */ |
59cfed7d | 629 | pad_check_dup(namesv, flags & padadd_OUR, ourstash); |
2d12d04f NC |
630 | } |
631 | ||
2435e5d3 | 632 | offset = pad_alloc_name(namesv, flags & ~padadd_UTF8_NAME, typestash, ourstash); |
3291825f NC |
633 | |
634 | /* not yet introduced */ | |
2df5bdd7 DM |
635 | COP_SEQ_RANGE_LOW_set(namesv, PERL_PADSEQ_INTRO); |
636 | COP_SEQ_RANGE_HIGH_set(namesv, 0); | |
3291825f NC |
637 | |
638 | if (!PL_min_intro_pending) | |
639 | PL_min_intro_pending = offset; | |
640 | PL_max_intro_pending = offset; | |
641 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
642 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
643 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
cc76b5cc | 644 | if (namelen != 0 && *namepv == '@') |
c1bf42f3 | 645 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
cc76b5cc | 646 | else if (namelen != 0 && *namepv == '%') |
c1bf42f3 | 647 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
6d5c2147 FC |
648 | else if (namelen != 0 && *namepv == '&') |
649 | sv_upgrade(PL_curpad[offset], SVt_PVCV); | |
c1bf42f3 | 650 | assert(SvPADMY(PL_curpad[offset])); |
3291825f NC |
651 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
652 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
cc76b5cc Z |
653 | (long)offset, SvPVX(namesv), |
654 | PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
655 | |
656 | return offset; | |
657 | } | |
658 | ||
cc76b5cc Z |
659 | /* |
660 | =for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash | |
dd2155a4 | 661 | |
cc76b5cc Z |
662 | Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string |
663 | instead of a string/length pair. | |
dd2155a4 | 664 | |
cc76b5cc Z |
665 | =cut |
666 | */ | |
667 | ||
668 | PADOFFSET | |
669 | Perl_pad_add_name_pv(pTHX_ const char *name, | |
0e1b3a4b | 670 | const U32 flags, HV *typestash, HV *ourstash) |
cc76b5cc Z |
671 | { |
672 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PV; | |
673 | return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash); | |
674 | } | |
dd2155a4 DM |
675 | |
676 | /* | |
cc76b5cc | 677 | =for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 678 | |
cc76b5cc Z |
679 | Exactly like L</pad_add_name_pvn>, but takes the name string in the form |
680 | of an SV instead of a string/length pair. | |
681 | ||
682 | =cut | |
683 | */ | |
684 | ||
685 | PADOFFSET | |
686 | Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash) | |
687 | { | |
688 | char *namepv; | |
689 | STRLEN namelen; | |
690 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
691 | namepv = SvPV(name, namelen); | |
e8b34487 BF |
692 | if (SvUTF8(name)) |
693 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
694 | return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash); |
695 | } | |
696 | ||
697 | /* | |
698 | =for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype | |
699 | ||
700 | Allocates a place in the currently-compiling pad, | |
701 | returning the offset of the allocated pad slot. | |
702 | No name is initially attached to the pad slot. | |
703 | I<tmptype> is a set of flags indicating the kind of pad entry required, | |
704 | which will be set in the value SV for the allocated pad entry: | |
705 | ||
706 | SVs_PADMY named lexical variable ("my", "our", "state") | |
707 | SVs_PADTMP unnamed temporary store | |
708 | ||
709 | I<optype> should be an opcode indicating the type of operation that the | |
710 | pad entry is to support. This doesn't affect operational semantics, | |
711 | but is used for debugging. | |
dd2155a4 DM |
712 | |
713 | =cut | |
714 | */ | |
715 | ||
716 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
717 | * or at least rationalise ??? */ | |
dd2155a4 DM |
718 | |
719 | PADOFFSET | |
720 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
721 | { | |
97aff369 | 722 | dVAR; |
dd2155a4 DM |
723 | SV *sv; |
724 | I32 retval; | |
725 | ||
6136c704 | 726 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
727 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
728 | ||
dd2155a4 | 729 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
730 | Perl_croak(aTHX_ "panic: pad_alloc, %p!=%p", |
731 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
732 | if (PL_pad_reset_pending) |
733 | pad_reset(); | |
734 | if (tmptype & SVs_PADMY) { | |
cc76b5cc | 735 | /* For a my, simply push a null SV onto the end of PL_comppad. */ |
235cc2e3 | 736 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
737 | retval = AvFILLp(PL_comppad); |
738 | } | |
739 | else { | |
cc76b5cc Z |
740 | /* For a tmp, scan the pad from PL_padix upwards |
741 | * for a slot which has no name and no active value. | |
742 | */ | |
551405c4 | 743 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 744 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
dd2155a4 DM |
745 | for (;;) { |
746 | /* | |
747 | * "foreach" index vars temporarily become aliases to non-"my" | |
748 | * values. Thus we must skip, not just pad values that are | |
749 | * marked as current pad values, but also those with names. | |
750 | */ | |
751 | /* HVDS why copy to sv here? we don't seem to use it */ | |
752 | if (++PL_padix <= names_fill && | |
753 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
754 | continue; | |
755 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
756 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
757 | !IS_PADGV(sv) && !IS_PADCONST(sv)) | |
758 | break; | |
759 | } | |
760 | retval = PL_padix; | |
761 | } | |
762 | SvFLAGS(sv) |= tmptype; | |
763 | PL_curpad = AvARRAY(PL_comppad); | |
764 | ||
765 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
766 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
767 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
768 | PL_op_name[optype])); | |
fd0854ff DM |
769 | #ifdef DEBUG_LEAKING_SCALARS |
770 | sv->sv_debug_optype = optype; | |
771 | sv->sv_debug_inpad = 1; | |
fd0854ff | 772 | #endif |
a212c8b5 | 773 | return (PADOFFSET)retval; |
dd2155a4 DM |
774 | } |
775 | ||
776 | /* | |
cc76b5cc | 777 | =for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype |
dd2155a4 | 778 | |
cc76b5cc Z |
779 | Allocates a place in the currently-compiling pad (via L</pad_alloc>) |
780 | for an anonymous function that is lexically scoped inside the | |
781 | currently-compiling function. | |
782 | The function I<func> is linked into the pad, and its C<CvOUTSIDE> link | |
783 | to the outer scope is weakened to avoid a reference loop. | |
784 | ||
84eea980 FC |
785 | One reference count is stolen, so you may need to do C<SvREFCNT_inc(func)>. |
786 | ||
cc76b5cc Z |
787 | I<optype> should be an opcode indicating the type of operation that the |
788 | pad entry is to support. This doesn't affect operational semantics, | |
789 | but is used for debugging. | |
dd2155a4 DM |
790 | |
791 | =cut | |
792 | */ | |
793 | ||
794 | PADOFFSET | |
cc76b5cc | 795 | Perl_pad_add_anon(pTHX_ CV* func, I32 optype) |
dd2155a4 | 796 | { |
97aff369 | 797 | dVAR; |
dd2155a4 | 798 | PADOFFSET ix; |
b9f83d2f | 799 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
800 | |
801 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
802 | ||
1dba731d | 803 | pad_peg("add_anon"); |
76f68e9b | 804 | sv_setpvs(name, "&"); |
0d311cdb DM |
805 | /* These two aren't used; just make sure they're not equal to |
806 | * PERL_PADSEQ_INTRO */ | |
807 | COP_SEQ_RANGE_LOW_set(name, 0); | |
808 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
cc76b5cc | 809 | ix = pad_alloc(optype, SVs_PADMY); |
dd2155a4 | 810 | av_store(PL_comppad_name, ix, name); |
f3548bdc | 811 | /* XXX DAPM use PL_curpad[] ? */ |
e09ac076 FC |
812 | if (SvTYPE(func) == SVt_PVCV || !CvOUTSIDE(func)) |
813 | av_store(PL_comppad, ix, (SV*)func); | |
814 | else { | |
7c93c29b | 815 | SV *rv = newRV_noinc((SV *)func); |
e09ac076 FC |
816 | sv_rvweaken(rv); |
817 | assert (SvTYPE(func) == SVt_PVFM); | |
818 | av_store(PL_comppad, ix, rv); | |
819 | } | |
cc76b5cc | 820 | SvPADMY_on((SV*)func); |
7dafbf52 DM |
821 | |
822 | /* to avoid ref loops, we never have parent + child referencing each | |
823 | * other simultaneously */ | |
e09ac076 | 824 | if (CvOUTSIDE(func) && SvTYPE(func) == SVt_PVCV) { |
cc76b5cc Z |
825 | assert(!CvWEAKOUTSIDE(func)); |
826 | CvWEAKOUTSIDE_on(func); | |
827 | SvREFCNT_dec(CvOUTSIDE(func)); | |
7dafbf52 | 828 | } |
dd2155a4 DM |
829 | return ix; |
830 | } | |
831 | ||
dd2155a4 | 832 | /* |
13087dd8 | 833 | =for apidoc pad_check_dup |
dd2155a4 DM |
834 | |
835 | Check for duplicate declarations: report any of: | |
13087dd8 | 836 | |
dd2155a4 | 837 | * a my in the current scope with the same name; |
13087dd8 FC |
838 | * an our (anywhere in the pad) with the same name and the |
839 | same stash as C<ourstash> | |
840 | ||
841 | C<is_our> indicates that the name to check is an 'our' declaration. | |
dd2155a4 DM |
842 | |
843 | =cut | |
844 | */ | |
845 | ||
20381b50 | 846 | STATIC void |
cc76b5cc | 847 | S_pad_check_dup(pTHX_ SV *name, U32 flags, const HV *ourstash) |
dd2155a4 | 848 | { |
97aff369 | 849 | dVAR; |
53c1dcc0 | 850 | SV **svp; |
dd2155a4 | 851 | PADOFFSET top, off; |
59cfed7d | 852 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 853 | |
7918f24d NC |
854 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
855 | ||
f3548bdc | 856 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 857 | |
59cfed7d | 858 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 859 | |
041457d9 | 860 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
861 | return; /* nothing to check */ |
862 | ||
863 | svp = AvARRAY(PL_comppad_name); | |
864 | top = AvFILLp(PL_comppad_name); | |
865 | /* check the current scope */ | |
866 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
867 | * type ? */ | |
868 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
869 | SV * const sv = svp[off]; |
870 | if (sv | |
dd2155a4 | 871 | && sv != &PL_sv_undef |
ee6cee0c | 872 | && !SvFAKE(sv) |
0d311cdb DM |
873 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
874 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
2d12d04f | 875 | && sv_eq(name, sv)) |
dd2155a4 | 876 | { |
00b1698f | 877 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 878 | break; /* "our" masking "our" */ |
4eb94d7c | 879 | /* diag_listed_as: "%s" variable %s masks earlier declaration in same %s */ |
dd2155a4 | 880 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
4eb94d7c | 881 | "\"%s\" %s %"SVf" masks earlier declaration in same %s", |
12bd6ede | 882 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
4eb94d7c | 883 | *SvPVX(sv) == '&' ? "subroutine" : "variable", |
c541b9b4 | 884 | sv, |
2df5bdd7 DM |
885 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
886 | ? "scope" : "statement")); | |
dd2155a4 DM |
887 | --off; |
888 | break; | |
889 | } | |
890 | } | |
891 | /* check the rest of the pad */ | |
892 | if (is_our) { | |
61c5492a | 893 | while (off > 0) { |
53c1dcc0 AL |
894 | SV * const sv = svp[off]; |
895 | if (sv | |
dd2155a4 | 896 | && sv != &PL_sv_undef |
ee6cee0c | 897 | && !SvFAKE(sv) |
0d311cdb DM |
898 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
899 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 900 | && SvOURSTASH(sv) == ourstash |
2d12d04f | 901 | && sv_eq(name, sv)) |
dd2155a4 DM |
902 | { |
903 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
c541b9b4 | 904 | "\"our\" variable %"SVf" redeclared", sv); |
624f69f5 | 905 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
906 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
907 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
908 | break; |
909 | } | |
61c5492a NC |
910 | --off; |
911 | } | |
dd2155a4 DM |
912 | } |
913 | } | |
914 | ||
915 | ||
dd2155a4 | 916 | /* |
cc76b5cc | 917 | =for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags |
dd2155a4 | 918 | |
cc76b5cc Z |
919 | Given the name of a lexical variable, find its position in the |
920 | currently-compiling pad. | |
921 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. | |
922 | I<flags> is reserved and must be zero. | |
923 | If it is not in the current pad but appears in the pad of any lexically | |
924 | enclosing scope, then a pseudo-entry for it is added in the current pad. | |
925 | Returns the offset in the current pad, | |
926 | or C<NOT_IN_PAD> if no such lexical is in scope. | |
dd2155a4 DM |
927 | |
928 | =cut | |
929 | */ | |
930 | ||
931 | PADOFFSET | |
cc76b5cc | 932 | Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags) |
dd2155a4 | 933 | { |
97aff369 | 934 | dVAR; |
b5c19bd7 DM |
935 | SV *out_sv; |
936 | int out_flags; | |
929a0744 | 937 | I32 offset; |
e1ec3a88 | 938 | const AV *nameav; |
929a0744 | 939 | SV **name_svp; |
dd2155a4 | 940 | |
cc76b5cc | 941 | PERL_ARGS_ASSERT_PAD_FINDMY_PVN; |
7918f24d | 942 | |
cc76b5cc | 943 | pad_peg("pad_findmy_pvn"); |
f8f98e0a | 944 | |
2435e5d3 | 945 | if (flags & ~padadd_UTF8_NAME) |
cc76b5cc | 946 | Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf, |
f8f98e0a NC |
947 | (UV)flags); |
948 | ||
e8b34487 BF |
949 | if (flags & padadd_UTF8_NAME) { |
950 | bool is_utf8 = TRUE; | |
951 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
952 | ||
953 | if (is_utf8) | |
954 | flags |= padadd_UTF8_NAME; | |
955 | else | |
956 | flags &= ~padadd_UTF8_NAME; | |
957 | } | |
958 | ||
fbb889c8 BF |
959 | offset = pad_findlex(namepv, namelen, flags, |
960 | PL_compcv, PL_cop_seqmax, 1, NULL, &out_sv, &out_flags); | |
9f7d9405 | 961 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
962 | return offset; |
963 | ||
964 | /* look for an our that's being introduced; this allows | |
965 | * our $foo = 0 unless defined $foo; | |
966 | * to not give a warning. (Yes, this is a hack) */ | |
967 | ||
86d2498c | 968 | nameav = PadlistARRAY(CvPADLIST(PL_compcv))[0]; |
929a0744 DM |
969 | name_svp = AvARRAY(nameav); |
970 | for (offset = AvFILLp(nameav); offset > 0; offset--) { | |
551405c4 | 971 | const SV * const namesv = name_svp[offset]; |
929a0744 DM |
972 | if (namesv && namesv != &PL_sv_undef |
973 | && !SvFAKE(namesv) | |
00b1698f | 974 | && (SvPAD_OUR(namesv)) |
cc76b5cc | 975 | && SvCUR(namesv) == namelen |
e8b34487 BF |
976 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
977 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0 ) | |
2df5bdd7 | 978 | && COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO |
929a0744 DM |
979 | ) |
980 | return offset; | |
981 | } | |
982 | return NOT_IN_PAD; | |
dd2155a4 DM |
983 | } |
984 | ||
e1f795dc | 985 | /* |
cc76b5cc Z |
986 | =for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags |
987 | ||
988 | Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string | |
989 | instead of a string/length pair. | |
990 | ||
991 | =cut | |
992 | */ | |
993 | ||
994 | PADOFFSET | |
995 | Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags) | |
996 | { | |
997 | PERL_ARGS_ASSERT_PAD_FINDMY_PV; | |
998 | return pad_findmy_pvn(name, strlen(name), flags); | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | =for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags | |
1003 | ||
1004 | Exactly like L</pad_findmy_pvn>, but takes the name string in the form | |
1005 | of an SV instead of a string/length pair. | |
1006 | ||
1007 | =cut | |
1008 | */ | |
1009 | ||
1010 | PADOFFSET | |
1011 | Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags) | |
1012 | { | |
1013 | char *namepv; | |
1014 | STRLEN namelen; | |
1015 | PERL_ARGS_ASSERT_PAD_FINDMY_SV; | |
1016 | namepv = SvPV(name, namelen); | |
2435e5d3 BF |
1017 | if (SvUTF8(name)) |
1018 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
1019 | return pad_findmy_pvn(namepv, namelen, flags); |
1020 | } | |
1021 | ||
1022 | /* | |
1023 | =for apidoc Amp|PADOFFSET|find_rundefsvoffset | |
1024 | ||
1025 | Find the position of the lexical C<$_> in the pad of the | |
1026 | currently-executing function. Returns the offset in the current pad, | |
1027 | or C<NOT_IN_PAD> if there is no lexical C<$_> in scope (in which case | |
1028 | the global one should be used instead). | |
1029 | L</find_rundefsv> is likely to be more convenient. | |
1030 | ||
1031 | =cut | |
1032 | */ | |
e1f795dc RGS |
1033 | |
1034 | PADOFFSET | |
29289021 | 1035 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc | 1036 | { |
97aff369 | 1037 | dVAR; |
e1f795dc RGS |
1038 | SV *out_sv; |
1039 | int out_flags; | |
fbb889c8 | 1040 | return pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
4608196e | 1041 | NULL, &out_sv, &out_flags); |
e1f795dc | 1042 | } |
dd2155a4 | 1043 | |
dd2155a4 | 1044 | /* |
cc76b5cc Z |
1045 | =for apidoc Am|SV *|find_rundefsv |
1046 | ||
1047 | Find and return the variable that is named C<$_> in the lexical scope | |
1048 | of the currently-executing function. This may be a lexical C<$_>, | |
1049 | or will otherwise be the global one. | |
1050 | ||
1051 | =cut | |
1052 | */ | |
789bd863 VP |
1053 | |
1054 | SV * | |
1055 | Perl_find_rundefsv(pTHX) | |
1056 | { | |
1057 | SV *namesv; | |
1058 | int flags; | |
1059 | PADOFFSET po; | |
1060 | ||
fbb889c8 | 1061 | po = pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
789bd863 VP |
1062 | NULL, &namesv, &flags); |
1063 | ||
1979170b | 1064 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) |
789bd863 VP |
1065 | return DEFSV; |
1066 | ||
1067 | return PAD_SVl(po); | |
1068 | } | |
1069 | ||
c086f97a FC |
1070 | SV * |
1071 | Perl_find_rundefsv2(pTHX_ CV *cv, U32 seq) | |
1072 | { | |
1073 | SV *namesv; | |
1074 | int flags; | |
1075 | PADOFFSET po; | |
1076 | ||
1077 | PERL_ARGS_ASSERT_FIND_RUNDEFSV2; | |
1078 | ||
1079 | po = pad_findlex("$_", 2, 0, cv, seq, 1, | |
1080 | NULL, &namesv, &flags); | |
1081 | ||
1082 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) | |
1083 | return DEFSV; | |
1084 | ||
86d2498c | 1085 | return AvARRAY(PadlistARRAY(CvPADLIST(cv))[CvDEPTH(cv)])[po]; |
c086f97a FC |
1086 | } |
1087 | ||
789bd863 | 1088 | /* |
fbb889c8 | 1089 | =for apidoc m|PADOFFSET|pad_findlex|const char *namepv|STRLEN namelen|U32 flags|const CV* cv|U32 seq|int warn|SV** out_capture|SV** out_name_sv|int *out_flags |
dd2155a4 DM |
1090 | |
1091 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
b5c19bd7 DM |
1092 | in the inner pads if it's found in an outer one. |
1093 | ||
1094 | Returns the offset in the bottom pad of the lex or the fake lex. | |
1095 | cv is the CV in which to start the search, and seq is the current cop_seq | |
1096 | to match against. If warn is true, print appropriate warnings. The out_* | |
1097 | vars return values, and so are pointers to where the returned values | |
1098 | should be stored. out_capture, if non-null, requests that the innermost | |
1099 | instance of the lexical is captured; out_name_sv is set to the innermost | |
1100 | matched namesv or fake namesv; out_flags returns the flags normally | |
1101 | associated with the IVX field of a fake namesv. | |
1102 | ||
1103 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
1104 | then comes back down, adding fake entries as it goes. It has to be this way | |
3441fb63 | 1105 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 1106 | the parent pad. |
dd2155a4 DM |
1107 | |
1108 | =cut | |
1109 | */ | |
1110 | ||
b5c19bd7 DM |
1111 | /* the CV has finished being compiled. This is not a sufficient test for |
1112 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
1113 | #define CvCOMPILED(cv) CvROOT(cv) | |
1114 | ||
71f882da | 1115 | /* the CV does late binding of its lexicals */ |
e07561e6 | 1116 | #define CvLATE(cv) (CvANON(cv) || CvCLONE(cv) || SvTYPE(cv) == SVt_PVFM) |
71f882da | 1117 | |
445f13ff FC |
1118 | static void |
1119 | S_unavailable(pTHX_ SV *namesv) | |
1120 | { | |
1121 | /* diag_listed_as: Variable "%s" is not available */ | |
1122 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
1123 | "%se \"%"SVf"\" is not available", | |
1124 | *SvPVX_const(namesv) == '&' | |
1125 | ? "Subroutin" | |
1126 | : "Variabl", | |
1127 | namesv); | |
1128 | } | |
b5c19bd7 | 1129 | |
dd2155a4 | 1130 | STATIC PADOFFSET |
fbb889c8 | 1131 | S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq, |
cc76b5cc | 1132 | int warn, SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 1133 | { |
97aff369 | 1134 | dVAR; |
b5c19bd7 DM |
1135 | I32 offset, new_offset; |
1136 | SV *new_capture; | |
1137 | SV **new_capturep; | |
b70d5558 | 1138 | const PADLIST * const padlist = CvPADLIST(cv); |
7ef30830 | 1139 | const bool staleok = !!(flags & padadd_STALEOK); |
dd2155a4 | 1140 | |
7918f24d NC |
1141 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
1142 | ||
7ef30830 | 1143 | if (flags & ~(padadd_UTF8_NAME|padadd_STALEOK)) |
2435e5d3 BF |
1144 | Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf, |
1145 | (UV)flags); | |
7ef30830 | 1146 | flags &= ~ padadd_STALEOK; /* one-shot flag */ |
2435e5d3 | 1147 | |
b5c19bd7 | 1148 | *out_flags = 0; |
a3985cdc | 1149 | |
b5c19bd7 | 1150 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
cc76b5cc | 1151 | "Pad findlex cv=0x%"UVxf" searching \"%.*s\" seq=%d%s\n", |
4c760560 | 1152 | PTR2UV(cv), (int)namelen, namepv, (int)seq, |
cc76b5cc | 1153 | out_capture ? " capturing" : "" )); |
dd2155a4 | 1154 | |
b5c19bd7 | 1155 | /* first, search this pad */ |
dd2155a4 | 1156 | |
b5c19bd7 DM |
1157 | if (padlist) { /* not an undef CV */ |
1158 | I32 fake_offset = 0; | |
86d2498c | 1159 | const AV * const nameav = PadlistARRAY(padlist)[0]; |
551405c4 | 1160 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 1161 | |
b5c19bd7 | 1162 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 | 1163 | const SV * const namesv = name_svp[offset]; |
b5c19bd7 | 1164 | if (namesv && namesv != &PL_sv_undef |
cc76b5cc | 1165 | && SvCUR(namesv) == namelen |
e8b34487 BF |
1166 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
1167 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)) | |
b5c19bd7 | 1168 | { |
6012dc80 | 1169 | if (SvFAKE(namesv)) { |
b5c19bd7 | 1170 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
1171 | continue; |
1172 | } | |
1173 | /* is seq within the range _LOW to _HIGH ? | |
1174 | * This is complicated by the fact that PL_cop_seqmax | |
1175 | * may have wrapped around at some point */ | |
1176 | if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO) | |
1177 | continue; /* not yet introduced */ | |
1178 | ||
1179 | if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) { | |
1180 | /* in compiling scope */ | |
1181 | if ( | |
1182 | (seq > COP_SEQ_RANGE_LOW(namesv)) | |
1183 | ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1)) | |
1184 | : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1)) | |
1185 | ) | |
1186 | break; | |
1187 | } | |
1188 | else if ( | |
1189 | (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv)) | |
1190 | ? | |
1191 | ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1192 | || seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1193 | ||
1194 | : ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1195 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1196 | ) | |
1197 | break; | |
ee6cee0c DM |
1198 | } |
1199 | } | |
1200 | ||
b5c19bd7 DM |
1201 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
1202 | if (offset > 0) { /* not fake */ | |
1203 | fake_offset = 0; | |
1204 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
1205 | ||
1206 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
1207 | * instances. For now, we just test !CvUNIQUE(cv), but | |
1208 | * ideally, we should detect my's declared within loops | |
1209 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 1210 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
1211 | * lexes as not multi as viewed from evals. */ |
1212 | ||
1213 | *out_flags = CvANON(cv) ? | |
1214 | PAD_FAKELEX_ANON : | |
1215 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
1216 | ? PAD_FAKELEX_MULTI : 0; | |
1217 | ||
1218 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
1219 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
1220 | PTR2UV(cv), (long)offset, | |
1221 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
1222 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
1223 | } |
1224 | else { /* fake match */ | |
1225 | offset = fake_offset; | |
1226 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 1227 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 1228 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 1229 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 1230 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 1231 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
1232 | )); |
1233 | } | |
dd2155a4 | 1234 | |
b5c19bd7 | 1235 | /* return the lex? */ |
dd2155a4 | 1236 | |
b5c19bd7 | 1237 | if (out_capture) { |
dd2155a4 | 1238 | |
b5c19bd7 | 1239 | /* our ? */ |
00b1698f | 1240 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 1241 | *out_capture = NULL; |
b5c19bd7 DM |
1242 | return offset; |
1243 | } | |
ee6cee0c | 1244 | |
b5c19bd7 DM |
1245 | /* trying to capture from an anon prototype? */ |
1246 | if (CvCOMPILED(cv) | |
1247 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
1248 | : *out_flags & PAD_FAKELEX_ANON) | |
1249 | { | |
a2a5de95 | 1250 | if (warn) |
445f13ff | 1251 | S_unavailable(aTHX_ |
0727928e BF |
1252 | newSVpvn_flags(namepv, namelen, |
1253 | SVs_TEMP | | |
1254 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
1255 | ||
a0714e2c | 1256 | *out_capture = NULL; |
b5c19bd7 | 1257 | } |
ee6cee0c | 1258 | |
b5c19bd7 DM |
1259 | /* real value */ |
1260 | else { | |
1261 | int newwarn = warn; | |
1262 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 1263 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
1264 | && warn && ckWARN(WARN_CLOSURE)) { |
1265 | newwarn = 0; | |
1266 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e BF |
1267 | "Variable \"%"SVf"\" will not stay shared", |
1268 | newSVpvn_flags(namepv, namelen, | |
1269 | SVs_TEMP | | |
1270 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
b5c19bd7 | 1271 | } |
dd2155a4 | 1272 | |
b5c19bd7 DM |
1273 | if (fake_offset && CvANON(cv) |
1274 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
1275 | { | |
1276 | SV *n; | |
1277 | /* not yet caught - look further up */ | |
1278 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1279 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
1280 | PTR2UV(cv))); | |
1281 | n = *out_name_sv; | |
fbb889c8 | 1282 | (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), |
282e1742 | 1283 | CvOUTSIDE_SEQ(cv), |
b5c19bd7 DM |
1284 | newwarn, out_capture, out_name_sv, out_flags); |
1285 | *out_name_sv = n; | |
1286 | return offset; | |
dd2155a4 | 1287 | } |
b5c19bd7 | 1288 | |
86d2498c | 1289 | *out_capture = AvARRAY(PadlistARRAY(padlist)[ |
7261499d | 1290 | CvDEPTH(cv) ? CvDEPTH(cv) : 1])[offset]; |
b5c19bd7 DM |
1291 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1292 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 1293 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 1294 | |
d1186544 | 1295 | if (SvPADSTALE(*out_capture) |
7ef30830 | 1296 | && (!CvDEPTH(cv) || !staleok) |
d1186544 DM |
1297 | && !SvPAD_STATE(name_svp[offset])) |
1298 | { | |
445f13ff | 1299 | S_unavailable(aTHX_ |
0727928e BF |
1300 | newSVpvn_flags(namepv, namelen, |
1301 | SVs_TEMP | | |
1302 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
a0714e2c | 1303 | *out_capture = NULL; |
dd2155a4 DM |
1304 | } |
1305 | } | |
b5c19bd7 | 1306 | if (!*out_capture) { |
cc76b5cc | 1307 | if (namelen != 0 && *namepv == '@') |
ad64d0ec | 1308 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
cc76b5cc | 1309 | else if (namelen != 0 && *namepv == '%') |
ad64d0ec | 1310 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
6d5c2147 FC |
1311 | else if (namelen != 0 && *namepv == '&') |
1312 | *out_capture = sv_2mortal(newSV_type(SVt_PVCV)); | |
b5c19bd7 DM |
1313 | else |
1314 | *out_capture = sv_newmortal(); | |
1315 | } | |
dd2155a4 | 1316 | } |
b5c19bd7 DM |
1317 | |
1318 | return offset; | |
ee6cee0c | 1319 | } |
b5c19bd7 DM |
1320 | } |
1321 | ||
1322 | /* it's not in this pad - try above */ | |
1323 | ||
1324 | if (!CvOUTSIDE(cv)) | |
1325 | return NOT_IN_PAD; | |
9f7d9405 | 1326 | |
b5c19bd7 | 1327 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1328 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1329 | new_capturep = out_capture ? out_capture : |
4608196e | 1330 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 | 1331 | |
7ef30830 FC |
1332 | offset = pad_findlex(namepv, namelen, |
1333 | flags | padadd_STALEOK*(new_capturep == &new_capture), | |
1334 | CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
b5c19bd7 | 1335 | new_capturep, out_name_sv, out_flags); |
9f7d9405 | 1336 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1337 | return NOT_IN_PAD; |
9f7d9405 | 1338 | |
b5c19bd7 DM |
1339 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1340 | ||
1341 | /* don't add new fake entries (via eval) to CVs that we have already | |
1342 | * finished compiling, or to undef CVs */ | |
1343 | if (CvCOMPILED(cv) || !padlist) | |
1344 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1345 | ||
1346 | { | |
3291825f | 1347 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1348 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1349 | "good" and only copying flag bits and pointers that it understands. |
1350 | */ | |
1351 | SV *new_namesv = newSVsv(*out_name_sv); | |
53c1dcc0 AL |
1352 | AV * const ocomppad_name = PL_comppad_name; |
1353 | PAD * const ocomppad = PL_comppad; | |
86d2498c FC |
1354 | PL_comppad_name = PadlistARRAY(padlist)[0]; |
1355 | PL_comppad = PadlistARRAY(padlist)[1]; | |
b5c19bd7 DM |
1356 | PL_curpad = AvARRAY(PL_comppad); |
1357 | ||
3291825f | 1358 | new_offset |
cc76b5cc | 1359 | = pad_alloc_name(new_namesv, |
59cfed7d | 1360 | (SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0), |
3291825f NC |
1361 | SvPAD_TYPED(*out_name_sv) |
1362 | ? SvSTASH(*out_name_sv) : NULL, | |
1363 | SvOURSTASH(*out_name_sv) | |
1364 | ); | |
1365 | ||
1366 | SvFAKE_on(new_namesv); | |
1367 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1368 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1369 | (long)new_offset, | |
1370 | (int) SvCUR(new_namesv), SvPVX(new_namesv))); | |
809abb02 | 1371 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 1372 | |
809abb02 | 1373 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 1374 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 1375 | NOOP; /* do nothing */ |
b5c19bd7 | 1376 | } |
71f882da | 1377 | else if (CvLATE(cv)) { |
b5c19bd7 | 1378 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 1379 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
1380 | CvCLONE_on(cv); |
1381 | } | |
1382 | else { | |
1383 | /* immediate creation - capture outer value right now */ | |
1384 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
81df9f6f FC |
1385 | /* But also note the offset, as newMYSUB needs it */ |
1386 | PARENT_PAD_INDEX_set(new_namesv, offset); | |
b5c19bd7 DM |
1387 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1388 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1389 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1390 | } |
b5c19bd7 | 1391 | *out_name_sv = new_namesv; |
809abb02 | 1392 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
1393 | |
1394 | PL_comppad_name = ocomppad_name; | |
1395 | PL_comppad = ocomppad; | |
4608196e | 1396 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1397 | } |
b5c19bd7 | 1398 | return new_offset; |
dd2155a4 DM |
1399 | } |
1400 | ||
fb8a9836 | 1401 | #ifdef DEBUGGING |
cc76b5cc | 1402 | |
dd2155a4 | 1403 | /* |
cc76b5cc | 1404 | =for apidoc Am|SV *|pad_sv|PADOFFSET po |
dd2155a4 | 1405 | |
cc76b5cc | 1406 | Get the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1407 | Use macro PAD_SV instead of calling this function directly. |
1408 | ||
1409 | =cut | |
1410 | */ | |
1411 | ||
dd2155a4 DM |
1412 | SV * |
1413 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1414 | { | |
97aff369 | 1415 | dVAR; |
f3548bdc | 1416 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1417 | |
dd2155a4 DM |
1418 | if (!po) |
1419 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1420 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1421 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1422 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1423 | ); |
1424 | return PL_curpad[po]; | |
1425 | } | |
1426 | ||
dd2155a4 | 1427 | /* |
cc76b5cc | 1428 | =for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv |
dd2155a4 | 1429 | |
cc76b5cc | 1430 | Set the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1431 | Use the macro PAD_SETSV() rather than calling this function directly. |
1432 | ||
1433 | =cut | |
1434 | */ | |
1435 | ||
dd2155a4 DM |
1436 | void |
1437 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1438 | { | |
97aff369 | 1439 | dVAR; |
7918f24d NC |
1440 | |
1441 | PERL_ARGS_ASSERT_PAD_SETSV; | |
1442 | ||
f3548bdc | 1443 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1444 | |
1445 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1446 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1447 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1448 | ); |
1449 | PL_curpad[po] = sv; | |
1450 | } | |
dd2155a4 | 1451 | |
cc76b5cc | 1452 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1453 | |
1454 | /* | |
cc76b5cc | 1455 | =for apidoc m|void|pad_block_start|int full |
dd2155a4 | 1456 | |
e89fca5e | 1457 | Update the pad compilation state variables on entry to a new block. |
dd2155a4 DM |
1458 | |
1459 | =cut | |
1460 | */ | |
1461 | ||
1462 | /* XXX DAPM perhaps: | |
1463 | * - integrate this in general state-saving routine ??? | |
1464 | * - combine with the state-saving going on in pad_new ??? | |
1465 | * - introduce a new SAVE type that does all this in one go ? | |
1466 | */ | |
1467 | ||
1468 | void | |
1469 | Perl_pad_block_start(pTHX_ int full) | |
1470 | { | |
97aff369 | 1471 | dVAR; |
f3548bdc | 1472 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
1473 | SAVEI32(PL_comppad_name_floor); |
1474 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
1475 | if (full) | |
1476 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1477 | if (PL_comppad_name_floor < 0) | |
1478 | PL_comppad_name_floor = 0; | |
1479 | SAVEI32(PL_min_intro_pending); | |
1480 | SAVEI32(PL_max_intro_pending); | |
1481 | PL_min_intro_pending = 0; | |
1482 | SAVEI32(PL_comppad_name_fill); | |
1483 | SAVEI32(PL_padix_floor); | |
1484 | PL_padix_floor = PL_padix; | |
1485 | PL_pad_reset_pending = FALSE; | |
1486 | } | |
1487 | ||
dd2155a4 | 1488 | /* |
cc76b5cc | 1489 | =for apidoc m|U32|intro_my |
dd2155a4 | 1490 | |
bf954566 FC |
1491 | "Introduce" my variables to visible status. This is called during parsing |
1492 | at the end of each statement to make lexical variables visible to | |
1493 | subsequent statements. | |
dd2155a4 DM |
1494 | |
1495 | =cut | |
1496 | */ | |
1497 | ||
1498 | U32 | |
1499 | Perl_intro_my(pTHX) | |
1500 | { | |
97aff369 | 1501 | dVAR; |
dd2155a4 | 1502 | SV **svp; |
dd2155a4 | 1503 | I32 i; |
6012dc80 | 1504 | U32 seq; |
dd2155a4 | 1505 | |
f3548bdc | 1506 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1507 | if (! PL_min_intro_pending) |
1508 | return PL_cop_seqmax; | |
1509 | ||
1510 | svp = AvARRAY(PL_comppad_name); | |
1511 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1512 | SV * const sv = svp[i]; |
1513 | ||
0d311cdb DM |
1514 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1515 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) | |
1516 | { | |
2df5bdd7 | 1517 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1518 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1519 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1520 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1521 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1522 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1523 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1524 | ); |
1525 | } | |
1526 | } | |
6012dc80 DM |
1527 | seq = PL_cop_seqmax; |
1528 | PL_cop_seqmax++; | |
1529 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ | |
1530 | PL_cop_seqmax++; | |
dd2155a4 DM |
1531 | PL_min_intro_pending = 0; |
1532 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1533 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1534 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1535 | |
6012dc80 | 1536 | return seq; |
dd2155a4 DM |
1537 | } |
1538 | ||
1539 | /* | |
cc76b5cc | 1540 | =for apidoc m|void|pad_leavemy |
dd2155a4 DM |
1541 | |
1542 | Cleanup at end of scope during compilation: set the max seq number for | |
1543 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1544 | ||
1545 | =cut | |
1546 | */ | |
1547 | ||
6d5c2147 | 1548 | OP * |
dd2155a4 DM |
1549 | Perl_pad_leavemy(pTHX) |
1550 | { | |
97aff369 | 1551 | dVAR; |
dd2155a4 | 1552 | I32 off; |
6d5c2147 | 1553 | OP *o = NULL; |
551405c4 | 1554 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1555 | |
1556 | PL_pad_reset_pending = FALSE; | |
1557 | ||
f3548bdc | 1558 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1559 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1560 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 | 1561 | const SV * const sv = svp[off]; |
9b387841 NC |
1562 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv)) |
1563 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
1564 | "%"SVf" never introduced", | |
1565 | SVfARG(sv)); | |
dd2155a4 DM |
1566 | } |
1567 | } | |
1568 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1569 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
6d5c2147 | 1570 | SV * const sv = svp[off]; |
2df5bdd7 DM |
1571 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1572 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
1573 | { | |
809abb02 | 1574 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1575 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1576 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1577 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1578 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1579 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 | 1580 | ); |
6d5c2147 FC |
1581 | if (!PadnameIsSTATE(sv) && !PadnameIsOUR(sv) |
1582 | && *PadnamePV(sv) == '&' && PadnameLEN(sv) > 1) { | |
1583 | OP *kid = newOP(OP_INTROCV, 0); | |
1584 | kid->op_targ = off; | |
1585 | o = op_prepend_elem(OP_LINESEQ, kid, o); | |
1586 | } | |
dd2155a4 DM |
1587 | } |
1588 | } | |
1589 | PL_cop_seqmax++; | |
6012dc80 DM |
1590 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ |
1591 | PL_cop_seqmax++; | |
dd2155a4 DM |
1592 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1593 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
6d5c2147 | 1594 | return o; |
dd2155a4 DM |
1595 | } |
1596 | ||
dd2155a4 | 1597 | /* |
cc76b5cc | 1598 | =for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust |
dd2155a4 DM |
1599 | |
1600 | Abandon the tmp in the current pad at offset po and replace with a | |
1601 | new one. | |
1602 | ||
1603 | =cut | |
1604 | */ | |
1605 | ||
1606 | void | |
1607 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1608 | { | |
97aff369 | 1609 | dVAR; |
f3548bdc | 1610 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1611 | if (!PL_curpad) |
1612 | return; | |
1613 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1614 | Perl_croak(aTHX_ "panic: pad_swipe curpad, %p!=%p", |
1615 | AvARRAY(PL_comppad), PL_curpad); | |
9100eeb1 Z |
1616 | if (!po || ((SSize_t)po) > AvFILLp(PL_comppad)) |
1617 | Perl_croak(aTHX_ "panic: pad_swipe po=%ld, fill=%ld", | |
1618 | (long)po, (long)AvFILLp(PL_comppad)); | |
dd2155a4 DM |
1619 | |
1620 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1621 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1622 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1623 | ||
1624 | if (PL_curpad[po]) | |
1625 | SvPADTMP_off(PL_curpad[po]); | |
1626 | if (refadjust) | |
1627 | SvREFCNT_dec(PL_curpad[po]); | |
1628 | ||
9ad9869c DM |
1629 | |
1630 | /* if pad tmps aren't shared between ops, then there's no need to | |
1631 | * create a new tmp when an existing op is freed */ | |
1632 | #ifdef USE_BROKEN_PAD_RESET | |
561b68a9 | 1633 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1634 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c DM |
1635 | #else |
1636 | PL_curpad[po] = &PL_sv_undef; | |
97bf4a8d | 1637 | #endif |
dd2155a4 DM |
1638 | if ((I32)po < PL_padix) |
1639 | PL_padix = po - 1; | |
1640 | } | |
1641 | ||
dd2155a4 | 1642 | /* |
cc76b5cc | 1643 | =for apidoc m|void|pad_reset |
dd2155a4 DM |
1644 | |
1645 | Mark all the current temporaries for reuse | |
1646 | ||
1647 | =cut | |
1648 | */ | |
1649 | ||
1650 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1651 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1652 | * on the stack by OPs that use them, there are several ways to get an alias | |
1653 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1654 | * We avoid doing this until we can think of a Better Way. | |
1655 | * GSAR 97-10-29 */ | |
1f676739 | 1656 | static void |
82af08ae | 1657 | S_pad_reset(pTHX) |
dd2155a4 | 1658 | { |
97aff369 | 1659 | dVAR; |
dd2155a4 | 1660 | #ifdef USE_BROKEN_PAD_RESET |
dd2155a4 | 1661 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
1662 | Perl_croak(aTHX_ "panic: pad_reset curpad, %p!=%p", |
1663 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1664 | |
1665 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1666 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1667 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1668 | (long)PL_padix, (long)PL_padix_floor | |
1669 | ) | |
1670 | ); | |
1671 | ||
284167a5 | 1672 | if (!TAINTING_get) { /* Can't mix tainted and non-tainted temporaries. */ |
eb578fdb | 1673 | I32 po; |
dd2155a4 DM |
1674 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1675 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1676 | SvPADTMP_off(PL_curpad[po]); | |
1677 | } | |
1678 | PL_padix = PL_padix_floor; | |
1679 | } | |
1680 | #endif | |
1681 | PL_pad_reset_pending = FALSE; | |
1682 | } | |
1683 | ||
dd2155a4 | 1684 | /* |
cc76b5cc Z |
1685 | =for apidoc Amx|void|pad_tidy|padtidy_type type |
1686 | ||
1687 | Tidy up a pad at the end of compilation of the code to which it belongs. | |
1688 | Jobs performed here are: remove most stuff from the pads of anonsub | |
1689 | prototypes; give it a @_; mark temporaries as such. I<type> indicates | |
1690 | the kind of subroutine: | |
dd2155a4 | 1691 | |
cc76b5cc Z |
1692 | padtidy_SUB ordinary subroutine |
1693 | padtidy_SUBCLONE prototype for lexical closure | |
1694 | padtidy_FORMAT format | |
dd2155a4 DM |
1695 | |
1696 | =cut | |
1697 | */ | |
1698 | ||
1699 | /* XXX DAPM surely most of this stuff should be done properly | |
1700 | * at the right time beforehand, rather than going around afterwards | |
1701 | * cleaning up our mistakes ??? | |
1702 | */ | |
1703 | ||
1704 | void | |
1705 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1706 | { | |
27da23d5 | 1707 | dVAR; |
dd2155a4 | 1708 | |
f3548bdc | 1709 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 DM |
1710 | |
1711 | /* If this CV has had any 'eval-capable' ops planted in it | |
1712 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any | |
1713 | * anon prototypes in the chain of CVs should be marked as cloneable, | |
1714 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets | |
1715 | * the right CvOUTSIDE. | |
1716 | * If running with -d, *any* sub may potentially have an eval | |
486ec47a | 1717 | * executed within it. |
b5c19bd7 DM |
1718 | */ |
1719 | ||
1720 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1721 | const CV *cv; |
b5c19bd7 DM |
1722 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1723 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1724 | break; /* no need to mark already-compiled code */ | |
1725 | if (CvANON(cv)) { | |
1726 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1727 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1728 | CvCLONE_on(cv); | |
1729 | } | |
00cc8743 | 1730 | CvHASEVAL_on(cv); |
b5c19bd7 DM |
1731 | } |
1732 | } | |
1733 | ||
dd2155a4 DM |
1734 | /* extend curpad to match namepad */ |
1735 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
a0714e2c | 1736 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1737 | |
1738 | if (type == padtidy_SUBCLONE) { | |
551405c4 | 1739 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1740 | PADOFFSET ix; |
b5c19bd7 | 1741 | |
dd2155a4 DM |
1742 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1743 | SV *namesv; | |
1744 | ||
1745 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1746 | continue; | |
1747 | /* | |
1748 | * The only things that a clonable function needs in its | |
b5c19bd7 | 1749 | * pad are anonymous subs. |
dd2155a4 DM |
1750 | * The rest are created anew during cloning. |
1751 | */ | |
a0714e2c | 1752 | if (!((namesv = namep[ix]) != NULL && |
dd2155a4 | 1753 | namesv != &PL_sv_undef && |
b15aece3 | 1754 | *SvPVX_const(namesv) == '&')) |
dd2155a4 DM |
1755 | { |
1756 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1757 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1758 | } |
1759 | } | |
1760 | } | |
1761 | else if (type == padtidy_SUB) { | |
1762 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1763 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1764 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1765 | AvREIFY_only(av); |
dd2155a4 DM |
1766 | } |
1767 | ||
4cee4ca8 | 1768 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
adf8f095 | 1769 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1770 | PADOFFSET ix; |
dd2155a4 DM |
1771 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1772 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1773 | continue; | |
adf8f095 | 1774 | if (!SvPADMY(PL_curpad[ix])) { |
dd2155a4 | 1775 | SvPADTMP_on(PL_curpad[ix]); |
adf8f095 NC |
1776 | } else if (!SvFAKE(namep[ix])) { |
1777 | /* This is a work around for how the current implementation of | |
1778 | ?{ } blocks in regexps interacts with lexicals. | |
1779 | ||
1780 | One of our lexicals. | |
1781 | Can't do this on all lexicals, otherwise sub baz() won't | |
1782 | compile in | |
1783 | ||
1784 | my $foo; | |
1785 | ||
1786 | sub bar { ++$foo; } | |
1787 | ||
1788 | sub baz { ++$foo; } | |
1789 | ||
1790 | because completion of compiling &bar calling pad_tidy() | |
1791 | would cause (top level) $foo to be marked as stale, and | |
1792 | "no longer available". */ | |
1793 | SvPADSTALE_on(PL_curpad[ix]); | |
1794 | } | |
dd2155a4 DM |
1795 | } |
1796 | } | |
f3548bdc | 1797 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1798 | } |
1799 | ||
dd2155a4 | 1800 | /* |
cc76b5cc | 1801 | =for apidoc m|void|pad_free|PADOFFSET po |
dd2155a4 | 1802 | |
8627550a | 1803 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1804 | |
1805 | =cut | |
1806 | */ | |
1807 | ||
1808 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1809 | void | |
1810 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1811 | { | |
97aff369 | 1812 | dVAR; |
ad9e6ae1 | 1813 | SV *sv; |
f3548bdc | 1814 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1815 | if (!PL_curpad) |
1816 | return; | |
1817 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1818 | Perl_croak(aTHX_ "panic: pad_free curpad, %p!=%p", |
1819 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1820 | if (!po) |
1821 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1822 | ||
1823 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1824 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1825 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1826 | ); | |
1827 | ||
ad9e6ae1 DM |
1828 | |
1829 | sv = PL_curpad[po]; | |
1830 | if (sv && sv != &PL_sv_undef && !SvPADMY(sv)) | |
1831 | SvFLAGS(sv) &= ~SVs_PADTMP; | |
1832 | ||
dd2155a4 DM |
1833 | if ((I32)po < PL_padix) |
1834 | PL_padix = po - 1; | |
1835 | } | |
1836 | ||
dd2155a4 | 1837 | /* |
cc76b5cc | 1838 | =for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full |
dd2155a4 DM |
1839 | |
1840 | Dump the contents of a padlist | |
1841 | ||
1842 | =cut | |
1843 | */ | |
1844 | ||
1845 | void | |
1846 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1847 | { | |
97aff369 | 1848 | dVAR; |
e1ec3a88 AL |
1849 | const AV *pad_name; |
1850 | const AV *pad; | |
dd2155a4 DM |
1851 | SV **pname; |
1852 | SV **ppad; | |
dd2155a4 DM |
1853 | I32 ix; |
1854 | ||
7918f24d NC |
1855 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1856 | ||
dd2155a4 DM |
1857 | if (!padlist) { |
1858 | return; | |
1859 | } | |
86d2498c FC |
1860 | pad_name = *PadlistARRAY(padlist); |
1861 | pad = PadlistARRAY(padlist)[1]; | |
dd2155a4 DM |
1862 | pname = AvARRAY(pad_name); |
1863 | ppad = AvARRAY(pad); | |
1864 | Perl_dump_indent(aTHX_ level, file, | |
1865 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1866 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1867 | ); | |
1868 | ||
1869 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1870 | const SV *namesv = pname[ix]; |
dd2155a4 | 1871 | if (namesv && namesv == &PL_sv_undef) { |
a0714e2c | 1872 | namesv = NULL; |
dd2155a4 DM |
1873 | } |
1874 | if (namesv) { | |
ee6cee0c DM |
1875 | if (SvFAKE(namesv)) |
1876 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1877 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1878 | (int) ix, |
1879 | PTR2UV(ppad[ix]), | |
1880 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1881 | SvPVX_const(namesv), |
809abb02 NC |
1882 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1883 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1884 | |
ee6cee0c DM |
1885 | ); |
1886 | else | |
1887 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1888 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1889 | (int) ix, |
1890 | PTR2UV(ppad[ix]), | |
1891 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1892 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1893 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1894 | SvPVX_const(namesv) |
ee6cee0c | 1895 | ); |
dd2155a4 DM |
1896 | } |
1897 | else if (full) { | |
1898 | Perl_dump_indent(aTHX_ level+1, file, | |
1899 | "%2d. 0x%"UVxf"<%lu>\n", | |
1900 | (int) ix, | |
1901 | PTR2UV(ppad[ix]), | |
1902 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1903 | ); | |
1904 | } | |
1905 | } | |
1906 | } | |
1907 | ||
cc76b5cc | 1908 | #ifdef DEBUGGING |
dd2155a4 DM |
1909 | |
1910 | /* | |
cc76b5cc | 1911 | =for apidoc m|void|cv_dump|CV *cv|const char *title |
dd2155a4 DM |
1912 | |
1913 | dump the contents of a CV | |
1914 | ||
1915 | =cut | |
1916 | */ | |
1917 | ||
dd2155a4 | 1918 | STATIC void |
e1ec3a88 | 1919 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1920 | { |
97aff369 | 1921 | dVAR; |
53c1dcc0 | 1922 | const CV * const outside = CvOUTSIDE(cv); |
b70d5558 | 1923 | PADLIST* const padlist = CvPADLIST(cv); |
dd2155a4 | 1924 | |
7918f24d NC |
1925 | PERL_ARGS_ASSERT_CV_DUMP; |
1926 | ||
dd2155a4 DM |
1927 | PerlIO_printf(Perl_debug_log, |
1928 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1929 | title, | |
1930 | PTR2UV(cv), | |
1931 | (CvANON(cv) ? "ANON" | |
71f882da | 1932 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1933 | : (cv == PL_main_cv) ? "MAIN" |
1934 | : CvUNIQUE(cv) ? "UNIQUE" | |
1935 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1936 | PTR2UV(outside), | |
1937 | (!outside ? "null" | |
1938 | : CvANON(outside) ? "ANON" | |
1939 | : (outside == PL_main_cv) ? "MAIN" | |
1940 | : CvUNIQUE(outside) ? "UNIQUE" | |
1941 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1942 | ||
1943 | PerlIO_printf(Perl_debug_log, | |
1944 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1945 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1946 | } | |
dd2155a4 | 1947 | |
cc76b5cc | 1948 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1949 | |
1950 | /* | |
cc76b5cc | 1951 | =for apidoc Am|CV *|cv_clone|CV *proto |
dd2155a4 | 1952 | |
cc76b5cc Z |
1953 | Clone a CV, making a lexical closure. I<proto> supplies the prototype |
1954 | of the function: its code, pad structure, and other attributes. | |
1955 | The prototype is combined with a capture of outer lexicals to which the | |
1956 | code refers, which are taken from the currently-executing instance of | |
1957 | the immediately surrounding code. | |
dd2155a4 DM |
1958 | |
1959 | =cut | |
1960 | */ | |
1961 | ||
e10681aa FC |
1962 | static CV *S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside); |
1963 | ||
1964 | static void | |
1965 | S_cv_clone_pad(pTHX_ CV *proto, CV *cv, CV *outside) | |
dd2155a4 | 1966 | { |
27da23d5 | 1967 | dVAR; |
dd2155a4 | 1968 | I32 ix; |
b70d5558 | 1969 | PADLIST* const protopadlist = CvPADLIST(proto); |
9ef8d569 | 1970 | PAD *const protopad_name = *PadlistARRAY(protopadlist); |
86d2498c | 1971 | const PAD *const protopad = PadlistARRAY(protopadlist)[1]; |
53c1dcc0 AL |
1972 | SV** const pname = AvARRAY(protopad_name); |
1973 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1974 | const I32 fname = AvFILLp(protopad_name); |
1975 | const I32 fpad = AvFILLp(protopad); | |
b5c19bd7 | 1976 | SV** outpad; |
71f882da | 1977 | long depth; |
e07561e6 | 1978 | bool subclones = FALSE; |
7918f24d | 1979 | |
dd2155a4 DM |
1980 | assert(!CvUNIQUE(proto)); |
1981 | ||
1b5aaca6 FC |
1982 | /* Anonymous subs have a weak CvOUTSIDE pointer, so its value is not |
1983 | * reliable. The currently-running sub is always the one we need to | |
1984 | * close over. | |
8d88fe29 FC |
1985 | * For my subs, the currently-running sub may not be the one we want. |
1986 | * We have to check whether it is a clone of CvOUTSIDE. | |
1b5aaca6 FC |
1987 | * Note that in general for formats, CvOUTSIDE != find_runcv. |
1988 | * Since formats may be nested inside closures, CvOUTSIDE may point | |
71f882da | 1989 | * to a prototype; we instead want the cloned parent who called us. |
af41786f | 1990 | */ |
71f882da | 1991 | |
e07561e6 | 1992 | if (!outside) { |
ebfebee4 | 1993 | if (CvWEAKOUTSIDE(proto)) |
71f882da | 1994 | outside = find_runcv(NULL); |
e07561e6 | 1995 | else { |
af41786f | 1996 | outside = CvOUTSIDE(proto); |
db4cf31d FC |
1997 | if ((CvCLONE(outside) && ! CvCLONED(outside)) |
1998 | || !CvPADLIST(outside) | |
8771da69 FC |
1999 | || PadlistNAMES(CvPADLIST(outside)) |
2000 | != protopadlist->xpadl_outid) { | |
db4cf31d FC |
2001 | outside = find_runcv_where( |
2002 | FIND_RUNCV_padid_eq, (IV)protopadlist->xpadl_outid, NULL | |
70794f7b | 2003 | ); |
db4cf31d | 2004 | /* outside could be null */ |
5dff782d | 2005 | } |
e07561e6 | 2006 | } |
5dff782d | 2007 | } |
db4cf31d | 2008 | depth = outside ? CvDEPTH(outside) : 0; |
71f882da DM |
2009 | if (!depth) |
2010 | depth = 1; | |
b5c19bd7 | 2011 | |
dd2155a4 DM |
2012 | ENTER; |
2013 | SAVESPTR(PL_compcv); | |
e07561e6 | 2014 | PL_compcv = cv; |
dd2155a4 | 2015 | |
a0d2bbd5 FC |
2016 | if (CvHASEVAL(cv)) |
2017 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); | |
dd2155a4 | 2018 | |
cbacc9aa | 2019 | SAVESPTR(PL_comppad_name); |
9ef8d569 | 2020 | PL_comppad_name = protopad_name; |
b7787f18 | 2021 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 2022 | |
b5c19bd7 | 2023 | av_fill(PL_comppad, fpad); |
dd2155a4 | 2024 | |
dd2155a4 DM |
2025 | PL_curpad = AvARRAY(PL_comppad); |
2026 | ||
db4cf31d | 2027 | outpad = outside && CvPADLIST(outside) |
86d2498c | 2028 | ? AvARRAY(PadlistARRAY(CvPADLIST(outside))[depth]) |
f2ead8b8 | 2029 | : NULL; |
8771da69 FC |
2030 | if (outpad) |
2031 | CvPADLIST(cv)->xpadl_outid = PadlistNAMES(CvPADLIST(outside)); | |
b5c19bd7 | 2032 | |
dd2155a4 | 2033 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
2034 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
2035 | SV *sv = NULL; | |
71f882da | 2036 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ |
b5c19bd7 | 2037 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
5aec98df FC |
2038 | /* formats may have an inactive, or even undefined, parent; |
2039 | but state vars are always available. */ | |
f2ead8b8 | 2040 | if (!outpad || !(sv = outpad[PARENT_PAD_INDEX(namesv)]) |
cae5dbbe | 2041 | || ( SvPADSTALE(sv) && !SvPAD_STATE(namesv) |
db4cf31d | 2042 | && (!outside || !CvDEPTH(outside))) ) { |
445f13ff | 2043 | S_unavailable(aTHX_ namesv); |
a0714e2c | 2044 | sv = NULL; |
71f882da | 2045 | } |
33894c1a | 2046 | else |
f84c484e | 2047 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 2048 | } |
71f882da | 2049 | if (!sv) { |
b15aece3 | 2050 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 2051 | if (sigil == '&') |
e07561e6 FC |
2052 | /* If there are state subs, we need to clone them, too. |
2053 | But they may need to close over variables we have | |
2054 | not cloned yet. So we will have to do a second | |
2055 | pass. Furthermore, there may be state subs clos- | |
2056 | ing over other state subs’ entries, so we have | |
2057 | to put a stub here and then clone into it on the | |
2058 | second pass. */ | |
6d5c2147 FC |
2059 | if (SvPAD_STATE(namesv) && !CvCLONED(ppad[ix])) { |
2060 | assert(SvTYPE(ppad[ix]) == SVt_PVCV); | |
2061 | subclones = 1; | |
2062 | sv = newSV_type(SVt_PVCV); | |
2063 | } | |
2064 | else if (PadnameLEN(namesv)>1 && !PadnameIsOUR(namesv)) | |
2065 | { | |
2066 | /* my sub */ | |
81df9f6f FC |
2067 | /* Just provide a stub, but name it. It will be |
2068 | upgrade to the real thing on scope entry. */ | |
2069 | sv = newSV_type(SVt_PVCV); | |
cf748c3c FC |
2070 | CvNAME_HEK_set( |
2071 | sv, | |
2072 | share_hek(SvPVX_const(namesv)+1, | |
2073 | SvCUR(namesv) - 1 | |
2074 | * (SvUTF8(namesv) ? -1 : 1), | |
2075 | 0) | |
2076 | ); | |
6d5c2147 FC |
2077 | } |
2078 | else sv = SvREFCNT_inc(ppad[ix]); | |
e1ec3a88 | 2079 | else if (sigil == '@') |
ad64d0ec | 2080 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 2081 | else if (sigil == '%') |
ad64d0ec | 2082 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2083 | else |
561b68a9 | 2084 | sv = newSV(0); |
235cc2e3 | 2085 | SvPADMY_on(sv); |
0d3b281c | 2086 | /* reset the 'assign only once' flag on each state var */ |
e07561e6 | 2087 | if (sigil != '&' && SvPAD_STATE(namesv)) |
0d3b281c | 2088 | SvPADSTALE_on(sv); |
dd2155a4 DM |
2089 | } |
2090 | } | |
2091 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
f84c484e | 2092 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
2093 | } |
2094 | else { | |
561b68a9 | 2095 | sv = newSV(0); |
dd2155a4 | 2096 | SvPADTMP_on(sv); |
dd2155a4 | 2097 | } |
71f882da | 2098 | PL_curpad[ix] = sv; |
dd2155a4 DM |
2099 | } |
2100 | ||
e07561e6 FC |
2101 | if (subclones) |
2102 | for (ix = fpad; ix > 0; ix--) { | |
2103 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; | |
2104 | if (namesv && namesv != &PL_sv_undef && !SvFAKE(namesv) | |
2105 | && SvPVX_const(namesv)[0] == '&' && SvPAD_STATE(namesv)) | |
2106 | S_cv_clone(aTHX_ (CV *)ppad[ix], (CV *)PL_curpad[ix], cv); | |
2107 | } | |
2108 | ||
e10681aa FC |
2109 | LEAVE; |
2110 | } | |
2111 | ||
2112 | static CV * | |
2113 | S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside) | |
2114 | { | |
c04ef36e TC |
2115 | dVAR; |
2116 | ||
e10681aa FC |
2117 | assert(!CvUNIQUE(proto)); |
2118 | ||
2119 | if (!cv) cv = MUTABLE_CV(newSV_type(SvTYPE(proto))); | |
2120 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC | |
2121 | |CVf_SLABBED); | |
2122 | CvCLONED_on(cv); | |
2123 | ||
2124 | CvFILE(cv) = CvDYNFILE(proto) ? savepv(CvFILE(proto)) | |
2125 | : CvFILE(proto); | |
2126 | if (CvNAMED(proto)) | |
2e800d79 | 2127 | CvNAME_HEK_set(cv, share_hek_hek(CvNAME_HEK(proto))); |
e10681aa FC |
2128 | else CvGV_set(cv,CvGV(proto)); |
2129 | CvSTASH_set(cv, CvSTASH(proto)); | |
2130 | OP_REFCNT_LOCK; | |
2131 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); | |
2132 | OP_REFCNT_UNLOCK; | |
2133 | CvSTART(cv) = CvSTART(proto); | |
2134 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); | |
2135 | ||
2136 | if (SvPOK(proto)) | |
2137 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); | |
2138 | if (SvMAGIC(proto)) | |
2139 | mg_copy((SV *)proto, (SV *)cv, 0, 0); | |
2140 | ||
2141 | if (CvPADLIST(proto)) S_cv_clone_pad(aTHX_ proto, cv, outside); | |
2142 | ||
dd2155a4 DM |
2143 | DEBUG_Xv( |
2144 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
e10681aa | 2145 | if (CvOUTSIDE(cv)) cv_dump(CvOUTSIDE(cv), "Outside"); |
dd2155a4 DM |
2146 | cv_dump(proto, "Proto"); |
2147 | cv_dump(cv, "To"); | |
2148 | ); | |
2149 | ||
dd2155a4 | 2150 | if (CvCONST(cv)) { |
b5c19bd7 DM |
2151 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
2152 | * The prototype was marked as a candiate for const-ization, | |
2153 | * so try to grab the current const value, and if successful, | |
2154 | * turn into a const sub: | |
2155 | */ | |
551405c4 | 2156 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 DM |
2157 | if (const_sv) { |
2158 | SvREFCNT_dec(cv); | |
be8851fc NC |
2159 | /* For this calling case, op_const_sv returns a *copy*, which we |
2160 | donate to newCONSTSUB. Yes, this is ugly, and should be killed. | |
2161 | Need to fix how lib/constant.pm works to eliminate this. */ | |
bd61b366 | 2162 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
b5c19bd7 DM |
2163 | } |
2164 | else { | |
2165 | CvCONST_off(cv); | |
2166 | } | |
dd2155a4 DM |
2167 | } |
2168 | ||
2169 | return cv; | |
2170 | } | |
2171 | ||
e07561e6 FC |
2172 | CV * |
2173 | Perl_cv_clone(pTHX_ CV *proto) | |
2174 | { | |
2175 | PERL_ARGS_ASSERT_CV_CLONE; | |
2176 | ||
fead5351 | 2177 | if (!CvPADLIST(proto)) Perl_croak(aTHX_ "panic: no pad in cv_clone"); |
e07561e6 FC |
2178 | return S_cv_clone(aTHX_ proto, NULL, NULL); |
2179 | } | |
2180 | ||
6d5c2147 FC |
2181 | /* Called only by pp_clonecv */ |
2182 | CV * | |
2183 | Perl_cv_clone_into(pTHX_ CV *proto, CV *target) | |
2184 | { | |
2185 | PERL_ARGS_ASSERT_CV_CLONE_INTO; | |
2186 | cv_undef(target); | |
2187 | return S_cv_clone(aTHX_ proto, target, NULL); | |
2188 | } | |
2189 | ||
dd2155a4 | 2190 | /* |
cc76b5cc | 2191 | =for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv |
dd2155a4 DM |
2192 | |
2193 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
7dafbf52 DM |
2194 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
2195 | moved to a pre-existing CV struct. | |
dd2155a4 DM |
2196 | |
2197 | =cut | |
2198 | */ | |
2199 | ||
2200 | void | |
2201 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
2202 | { | |
97aff369 | 2203 | dVAR; |
dd2155a4 | 2204 | I32 ix; |
86d2498c FC |
2205 | AV * const comppad_name = PadlistARRAY(padlist)[0]; |
2206 | AV * const comppad = PadlistARRAY(padlist)[1]; | |
53c1dcc0 AL |
2207 | SV ** const namepad = AvARRAY(comppad_name); |
2208 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
2209 | |
2210 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
2211 | PERL_UNUSED_ARG(old_cv); |
2212 | ||
dd2155a4 | 2213 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 2214 | const SV * const namesv = namepad[ix]; |
09a30bc4 | 2215 | if (namesv && namesv != &PL_sv_undef && !SvPAD_STATE(namesv) |
b15aece3 | 2216 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 2217 | { |
e09ac076 | 2218 | if (SvTYPE(curpad[ix]) == SVt_PVCV) { |
0afba48f FC |
2219 | MAGIC * const mg = |
2220 | SvMAGICAL(curpad[ix]) | |
2221 | ? mg_find(curpad[ix], PERL_MAGIC_proto) | |
2222 | : NULL; | |
2223 | CV * const innercv = MUTABLE_CV(mg ? mg->mg_obj : curpad[ix]); | |
2224 | if (CvOUTSIDE(innercv) == old_cv) { | |
1f122f9b FC |
2225 | if (!CvWEAKOUTSIDE(innercv)) { |
2226 | SvREFCNT_dec(old_cv); | |
2227 | SvREFCNT_inc_simple_void_NN(new_cv); | |
2228 | } | |
0afba48f FC |
2229 | CvOUTSIDE(innercv) = new_cv; |
2230 | } | |
e09ac076 FC |
2231 | } |
2232 | else { /* format reference */ | |
2233 | SV * const rv = curpad[ix]; | |
2234 | CV *innercv; | |
2235 | if (!SvOK(rv)) continue; | |
2236 | assert(SvROK(rv)); | |
2237 | assert(SvWEAKREF(rv)); | |
2238 | innercv = (CV *)SvRV(rv); | |
2239 | assert(!CvWEAKOUTSIDE(innercv)); | |
2240 | SvREFCNT_dec(CvOUTSIDE(innercv)); | |
2241 | CvOUTSIDE(innercv) = (CV *)SvREFCNT_inc_simple_NN(new_cv); | |
2242 | } | |
dd2155a4 DM |
2243 | } |
2244 | } | |
2245 | } | |
2246 | ||
2247 | /* | |
cc76b5cc | 2248 | =for apidoc m|void|pad_push|PADLIST *padlist|int depth |
dd2155a4 DM |
2249 | |
2250 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
2251 | this depth, in which case don't bother creating a new one. Then give |
2252 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
2253 | |
2254 | =cut | |
2255 | */ | |
2256 | ||
2257 | void | |
26019298 | 2258 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 2259 | { |
97aff369 | 2260 | dVAR; |
7918f24d NC |
2261 | |
2262 | PERL_ARGS_ASSERT_PAD_PUSH; | |
2263 | ||
86d2498c FC |
2264 | if (depth > PadlistMAX(padlist) || !PadlistARRAY(padlist)[depth]) { |
2265 | PAD** const svp = PadlistARRAY(padlist); | |
44f8325f AL |
2266 | AV* const newpad = newAV(); |
2267 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
2268 | I32 ix = AvFILLp((const AV *)svp[1]); |
2269 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 2270 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
2271 | AV *av; |
2272 | ||
dd2155a4 DM |
2273 | for ( ;ix > 0; ix--) { |
2274 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
b15aece3 | 2275 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
2276 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
2277 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2278 | || sigil == '&') | |
2279 | { | |
dd2155a4 DM |
2280 | /* outer lexical or anon code */ |
2281 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
2282 | } | |
2283 | else { /* our own lexical */ | |
26019298 AL |
2284 | SV *sv; |
2285 | if (sigil == '@') | |
ad64d0ec | 2286 | sv = MUTABLE_SV(newAV()); |
26019298 | 2287 | else if (sigil == '%') |
ad64d0ec | 2288 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2289 | else |
561b68a9 | 2290 | sv = newSV(0); |
26019298 | 2291 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2292 | SvPADMY_on(sv); |
2293 | } | |
2294 | } | |
2295 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
f84c484e | 2296 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
2297 | } |
2298 | else { | |
2299 | /* save temporaries on recursion? */ | |
561b68a9 | 2300 | SV * const sv = newSV(0); |
26019298 | 2301 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2302 | SvPADTMP_on(sv); |
2303 | } | |
2304 | } | |
26019298 | 2305 | av = newAV(); |
ad64d0ec | 2306 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 2307 | AvREIFY_only(av); |
26019298 | 2308 | |
7261499d | 2309 | padlist_store(padlist, depth, newpad); |
dd2155a4 DM |
2310 | } |
2311 | } | |
b21dc031 | 2312 | |
cc76b5cc Z |
2313 | /* |
2314 | =for apidoc Am|HV *|pad_compname_type|PADOFFSET po | |
2315 | ||
2316 | Looks up the type of the lexical variable at position I<po> in the | |
2317 | currently-compiling pad. If the variable is typed, the stash of the | |
2318 | class to which it is typed is returned. If not, C<NULL> is returned. | |
2319 | ||
2320 | =cut | |
2321 | */ | |
b21dc031 AL |
2322 | |
2323 | HV * | |
2324 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
2325 | { | |
97aff369 | 2326 | dVAR; |
551405c4 | 2327 | SV* const * const av = av_fetch(PL_comppad_name, po, FALSE); |
00b1698f | 2328 | if ( SvPAD_TYPED(*av) ) { |
b21dc031 AL |
2329 | return SvSTASH(*av); |
2330 | } | |
5c284bb0 | 2331 | return NULL; |
b21dc031 | 2332 | } |
66610fdd | 2333 | |
d5b1589c NC |
2334 | #if defined(USE_ITHREADS) |
2335 | ||
2336 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
2337 | ||
cc76b5cc | 2338 | /* |
b70d5558 | 2339 | =for apidoc padlist_dup |
cc76b5cc Z |
2340 | |
2341 | Duplicates a pad. | |
2342 | ||
2343 | =cut | |
2344 | */ | |
2345 | ||
b70d5558 FC |
2346 | PADLIST * |
2347 | Perl_padlist_dup(pTHX_ PADLIST *srcpad, CLONE_PARAMS *param) | |
d5b1589c | 2348 | { |
7261499d FC |
2349 | PADLIST *dstpad; |
2350 | bool cloneall; | |
2351 | PADOFFSET max; | |
2352 | ||
d5b1589c NC |
2353 | PERL_ARGS_ASSERT_PADLIST_DUP; |
2354 | ||
2355 | if (!srcpad) | |
2356 | return NULL; | |
2357 | ||
7261499d | 2358 | cloneall = param->flags & CLONEf_COPY_STACKS |
86d2498c FC |
2359 | || SvREFCNT(PadlistARRAY(srcpad)[1]) > 1; |
2360 | assert (SvREFCNT(PadlistARRAY(srcpad)[1]) == 1); | |
7261499d | 2361 | |
86d2498c | 2362 | max = cloneall ? PadlistMAX(srcpad) : 1; |
7261499d FC |
2363 | |
2364 | Newx(dstpad, 1, PADLIST); | |
2365 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
86d2498c FC |
2366 | PadlistMAX(dstpad) = max; |
2367 | Newx(PadlistARRAY(dstpad), max + 1, PAD *); | |
7261499d FC |
2368 | |
2369 | if (cloneall) { | |
2370 | PADOFFSET depth; | |
2371 | for (depth = 0; depth <= max; ++depth) | |
86d2498c FC |
2372 | PadlistARRAY(dstpad)[depth] = |
2373 | av_dup_inc(PadlistARRAY(srcpad)[depth], param); | |
6de654a5 NC |
2374 | } else { |
2375 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
2376 | to build anything other than the first level of pads. */ | |
86d2498c | 2377 | I32 ix = AvFILLp(PadlistARRAY(srcpad)[1]); |
6de654a5 | 2378 | AV *pad1; |
86d2498c FC |
2379 | const I32 names_fill = AvFILLp(PadlistARRAY(srcpad)[0]); |
2380 | const PAD *const srcpad1 = PadlistARRAY(srcpad)[1]; | |
6de654a5 NC |
2381 | SV **oldpad = AvARRAY(srcpad1); |
2382 | SV **names; | |
2383 | SV **pad1a; | |
2384 | AV *args; | |
6de654a5 | 2385 | |
86d2498c FC |
2386 | PadlistARRAY(dstpad)[0] = |
2387 | av_dup_inc(PadlistARRAY(srcpad)[0], param); | |
2388 | names = AvARRAY(PadlistARRAY(dstpad)[0]); | |
6de654a5 NC |
2389 | |
2390 | pad1 = newAV(); | |
2391 | ||
2392 | av_extend(pad1, ix); | |
86d2498c | 2393 | PadlistARRAY(dstpad)[1] = pad1; |
6de654a5 | 2394 | pad1a = AvARRAY(pad1); |
6de654a5 NC |
2395 | |
2396 | if (ix > -1) { | |
2397 | AvFILLp(pad1) = ix; | |
2398 | ||
2399 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
2400 | if (!oldpad[ix]) { |
2401 | pad1a[ix] = NULL; | |
2402 | } else if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
2403 | const char sigil = SvPVX_const(names[ix])[0]; | |
2404 | if ((SvFLAGS(names[ix]) & SVf_FAKE) | |
2405 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2406 | || sigil == '&') | |
2407 | { | |
2408 | /* outer lexical or anon code */ | |
2409 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2410 | } | |
2411 | else { /* our own lexical */ | |
adf8f095 NC |
2412 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
2413 | /* This is a work around for how the current | |
2414 | implementation of ?{ } blocks in regexps | |
2415 | interacts with lexicals. */ | |
05d04d9c NC |
2416 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2417 | } else { | |
2418 | SV *sv; | |
2419 | ||
2420 | if (sigil == '@') | |
2421 | sv = MUTABLE_SV(newAV()); | |
2422 | else if (sigil == '%') | |
2423 | sv = MUTABLE_SV(newHV()); | |
2424 | else | |
2425 | sv = newSV(0); | |
2426 | pad1a[ix] = sv; | |
2427 | SvPADMY_on(sv); | |
2428 | } | |
2429 | } | |
2430 | } | |
2431 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
2432 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2433 | } | |
2434 | else { | |
2435 | /* save temporaries on recursion? */ | |
2436 | SV * const sv = newSV(0); | |
2437 | pad1a[ix] = sv; | |
2438 | ||
2439 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
2440 | FIXTHAT before merging this branch. | |
2441 | (And I know how to) */ | |
2442 | if (SvPADMY(oldpad[ix])) | |
2443 | SvPADMY_on(sv); | |
2444 | else | |
2445 | SvPADTMP_on(sv); | |
2446 | } | |
6de654a5 NC |
2447 | } |
2448 | ||
2449 | if (oldpad[0]) { | |
2450 | args = newAV(); /* Will be @_ */ | |
2451 | AvREIFY_only(args); | |
2452 | pad1a[0] = (SV *)args; | |
2453 | } | |
2454 | } | |
2455 | } | |
d5b1589c NC |
2456 | |
2457 | return dstpad; | |
2458 | } | |
2459 | ||
cc76b5cc | 2460 | #endif /* USE_ITHREADS */ |
d5b1589c | 2461 | |
7261499d FC |
2462 | PAD ** |
2463 | Perl_padlist_store(pTHX_ register PADLIST *padlist, I32 key, PAD *val) | |
2464 | { | |
2465 | dVAR; | |
2466 | PAD **ary; | |
86d2498c | 2467 | SSize_t const oldmax = PadlistMAX(padlist); |
7261499d FC |
2468 | |
2469 | PERL_ARGS_ASSERT_PADLIST_STORE; | |
2470 | ||
2471 | assert(key >= 0); | |
2472 | ||
86d2498c FC |
2473 | if (key > PadlistMAX(padlist)) { |
2474 | av_extend_guts(NULL,key,&PadlistMAX(padlist), | |
2475 | (SV ***)&PadlistARRAY(padlist), | |
2476 | (SV ***)&PadlistARRAY(padlist)); | |
2477 | Zero(PadlistARRAY(padlist)+oldmax+1, PadlistMAX(padlist)-oldmax, | |
7261499d FC |
2478 | PAD *); |
2479 | } | |
86d2498c | 2480 | ary = PadlistARRAY(padlist); |
7261499d FC |
2481 | SvREFCNT_dec(ary[key]); |
2482 | ary[key] = val; | |
2483 | return &ary[key]; | |
2484 | } | |
2485 | ||
66610fdd RGS |
2486 | /* |
2487 | * Local variables: | |
2488 | * c-indentation-style: bsd | |
2489 | * c-basic-offset: 4 | |
14d04a33 | 2490 | * indent-tabs-mode: nil |
66610fdd RGS |
2491 | * End: |
2492 | * | |
14d04a33 | 2493 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 2494 | */ |